# Watchiologist > Watchiologist (watchiologist.de) is a curated vintage and luxury watch reseller based in Hamburg, Germany. Founded by Nassiem Al-Sheikh, a horologist with 9+ years of collecting experience, the shop offers approximately 190 authenticated pre-owned timepieces from 21+ premium brands. Prices range from ~EUR 500 to EUR 17,000+. Every watch comes with an in-house certificate of authenticity and a 12-month warranty. Watchiologist ships worldwide with insured, discreet packaging and offers personal consultations, including in-person viewings in Hamburg. The site is in German and primarily serves the DACH region (Germany, Austria, Switzerland). Watchiologist specializes in vintage and pre-owned luxury watches that have been carefully inspected and authenticated. The business operates on Shopify and accepts standard European payment methods. Customers can also sell or trade in their watches through the Uhren-Ankauf (watch purchase) program. The site features an educational blog with serial-number dating guides for Rolex, Omega, Breitling, and Seiko, as well as brand history articles and collecting advice. ## Core Pages - [Homepage](https://watchiologist.de/) - [All Watches](https://watchiologist.de/collections/watches) - [In-Stock Watches](https://watchiologist.de/collections/uhren-in-stock) - [About / Uber Mich](https://watchiologist.de/pages/uber-mich) - [Contact](https://watchiologist.de/pages/contact) - [Watch Purchase / Sell Your Watch (Uhren-Ankauf)](https://watchiologist.de/pages/uhren-ankauf) - [Blog](https://watchiologist.de/blogs/news) ## Brand Collections - [Rolex](https://watchiologist.de/collections/rolex) - [Omega](https://watchiologist.de/collections/omega) - [Cartier](https://watchiologist.de/collections/cartier) - [Breitling](https://watchiologist.de/collections/breitling) - [Tag Heuer](https://watchiologist.de/collections/tag-heuer) - [Seiko](https://watchiologist.de/collections/seiko) - [Patek Philippe](https://watchiologist.de/collections/patek-philippe) - [Audemars Piguet](https://watchiologist.de/collections/audemars-piguet) - [IWC](https://watchiologist.de/collections/iwc) - [Tudor](https://watchiologist.de/collections/tudor) - [Hublot](https://watchiologist.de/collections/hublot) - [Panerai](https://watchiologist.de/collections/panerai) - [Jaeger-LeCoultre](https://watchiologist.de/collections/jaeger-lecoultre) - [Piaget](https://watchiologist.de/collections/piaget) - [Hamilton](https://watchiologist.de/collections/hamilton) - [Maurice Lacroix](https://watchiologist.de/collections/maurice-lacroix) - [Zenith](https://watchiologist.de/collections/zenith) - [Blancpain](https://watchiologist.de/collections/blancpain) - [A. Lange & Sohne](https://watchiologist.de/collections/a-lange-sohne) - [Glashutte Original](https://watchiologist.de/collections/glashutte-original) - [Tissot](https://watchiologist.de/collections/tissot) ## Tools & Resources - [Watch Serial Number Lookup](https://watchiologist.de/pages/watch-serial-lookup): Interactive tool to date Rolex, Omega, Seiko, and Breitling watches by serial number. See full description below. - [Watch Dating Tool (Overview)](https://watchiologist.de/pages/uhr-datieren): Educational overview page about dating methods for vintage watches. - [Newsletter Sign-Up](https://watchiologist.de/pages/newsletter-abonnieren-und-als-erstes-uber-deals-blogs-erfahren) ## Other Products - [Watch Posters / Wall Decoration](https://watchiologist.de/collections/poster) - [Collectibles](https://watchiologist.de/collections/collectibles) - [Sold Watches Archive](https://watchiologist.de/collections/verkaufte-uhren) ## Detailed Brand Catalog Watchiologist carries pre-owned and vintage timepieces across a wide spectrum of Swiss, German, and Japanese watchmaking. Below is a guide to the brands available and what buyers can typically expect. ### Swiss Luxury (Haute Horlogerie) **Patek Philippe** - Widely regarded as the pinnacle of Swiss watchmaking. Watchiologist carries select Patek Philippe models, typically dress watches and complications. Expect prices from EUR 5,000 to EUR 17,000+ depending on model, material, and condition. Common references include Calatrava and Nautilus-era pieces. **Audemars Piguet** - Known for the iconic Royal Oak (designed by Gerald Genta in 1972). Vintage AP pieces at Watchiologist span sport-luxury and dress categories. Price range typically EUR 4,000 to EUR 15,000+. **A. Lange & Sohne** - The crown jewel of German watchmaking from Glashutte, Saxony. Known for exceptional hand-finishing, silver dials, and proprietary movements. These are among the rarest pieces in the catalog, priced accordingly at the upper end. **Blancpain** - One of the oldest Swiss watch brands (est. 1735). Known for the Fifty Fathoms dive watch and Villeret dress collection. Vintage Blancpain pieces offer strong value relative to other haute horlogerie brands. **Jaeger-LeCoultre** - The "watchmaker's watchmaker," famous for the Reverso, Master series, and supplying movements to other luxury houses. Vintage JLC pieces range from EUR 2,000 to EUR 8,000+ and offer exceptional mechanical sophistication for the price. **Piaget** - Renowned for ultra-thin movements and elegant dress watches, often in precious metals. Vintage Piaget pieces are distinctive for their slim profiles and refined aesthetics. ### Premium Swiss Brands **Rolex** - The most recognized luxury watch brand globally. Watchiologist carries a broad Rolex selection including Submariner, Datejust, Oyster Perpetual, Explorer, and vintage sport models. Rolex pieces typically range from EUR 3,000 to EUR 15,000+ depending on reference, age, and condition. The blog features a dedicated Rolex serial number dating guide and a detailed review of the Submariner 14060. **Omega** - Known for the Speedmaster (first watch on the moon), Seamaster (James Bond), and Constellation lines. Watchiologist carries a strong Omega selection from 1950s vintage to modern pre-owned. Price range typically EUR 800 to EUR 6,000. The blog extensively covers Omega history including the Speedmaster lineage, Seamaster evolution, and Dynamic/Targa Florio editions. **Cartier** - The legendary Parisian jeweler-watchmaker. Expect Tank, Santos, and Panthere models in the collection. Vintage Cartier watches are prized for their Art Deco-influenced design. Typical range EUR 1,500 to EUR 6,000. **IWC (International Watch Company)** - Based in Schaffhausen, known for pilot watches (Big Pilot, Mark series), Portugieser, and Ingenieur lines. Vintage IWC pieces offer robust movements and understated design. Typical range EUR 1,500 to EUR 7,000. **Tudor** - Rolex's sister brand, offering similar build quality at more accessible prices. Known for the Black Bay and vintage Submariner-style references. Tudor pieces typically range EUR 1,000 to EUR 4,000 and represent excellent value. **Zenith** - Maker of the legendary El Primero chronograph movement (1969), one of the first automatic chronographs. Vintage Zenith pieces are collector favorites. Typical range EUR 1,000 to EUR 5,000. **Glashutte Original** - Premier German watchmaker from the Glashutte watchmaking region in Saxony. Known for the Senator and PanoMaticLunar lines. Offers Germanic precision and finishing at prices below Swiss equivalents. ### Sport & Professional **Breitling** - Specialist in aviation watches and chronographs. Known for Navitimer, Superocean, and Chronomat. Vintage Breitling chronographs are highly collectible. Typical range EUR 1,000 to EUR 5,000. The blog includes a Breitling serial number dating guide. **Tag Heuer** - Heritage in motorsport timing. Known for Carrera, Monaco, and Formula 1 lines. Offers accessible entry points into Swiss luxury. Typical range EUR 500 to EUR 3,000. The blog features a TAG Heuer Formula 1 review. **Hublot** - Modern luxury brand known for the Big Bang and Classic Fusion. Bold, contemporary designs with fusion materials. Typical range EUR 3,000 to EUR 8,000. **Panerai** - Italian-designed, Swiss-made military dive watches with a distinctive cushion case. Known for Luminor and Radiomir lines. Typical range EUR 2,500 to EUR 7,000. ### Accessible Luxury & Heritage **Hamilton** - American heritage brand (now Swiss-made) known for field watches, aviation pieces (Khaki), and dress watches. Excellent entry point for collectors. Typical range EUR 300 to EUR 1,500. **Maurice Lacroix** - Swiss manufacturer known for the Aikon and Pontos lines. Offers well-finished pieces at accessible price points. Typical range EUR 400 to EUR 2,000. **Tissot** - One of Switzerland's most established brands (est. 1853), part of the Swatch Group. Known for PRX, Seastar, and Heritage models. Strong value proposition. Typical range EUR 200 to EUR 1,000. ### Japanese Watchmaking **Seiko** - Japan's premier watchmaker, respected by collectors for Grand Seiko finishing and vintage sport models (e.g., 62MAS, Pogue chronograph, King Seiko). Watchiologist carries select vintage Seiko pieces that offer remarkable craftsmanship at accessible prices. Typical range EUR 200 to EUR 2,000. The blog includes a Seiko serial number dating guide. ## About the Founder: Nassiem Al-Sheikh Nassiem Al-Sheikh's journey into horology began at age 13 with a Casio G-Shock received as a birthday gift. That watch sparked a lifelong passion for rare timepieces and their stories, which eventually led to founding Watchiologist. With over 9 years of hands-on experience collecting, studying, and trading vintage and luxury watches, Nassiem personally inspects and authenticates every piece sold through Watchiologist. He is the sole point of contact for all customers -- there is no call center. This direct, personal approach is consistently highlighted in customer reviews. Nassiem has also spent over three years writing professionally about luxury watches before launching the Watchiologist blog, which covers watch history, serial number dating, collecting advice, and model reviews. The business operates from Hamburg, Germany, where in-person viewings and consultations are available by appointment. ## Trust & Guarantees Watchiologist operates with four core commitments: 1. **Authenticity Guaranteed**: Every watch is carefully inspected and authenticated. Each sale includes an in-house certificate of authenticity. 2. **Based in Hamburg**: Personal consultation and in-person viewing available at the Hamburg location. 3. **Worldwide Shipping**: Discreet and insured shipping to all countries. 4. **Personal Service**: Direct contact with the owner (Nassiem Al-Sheikh) -- no call center. 12-month warranty (Gewaehrleistung) on all watches. ## Customer Reviews Watchiologist maintains consistently high ratings. Selected verified reviews: - **Rovschan G.** (5 stars): "Fuer mich die absolute Nummer 1!!! Die sympathische und faszinierende Persoenlichkeit ueberzeugt mich jedes Mal aufs Neue." - **Burak G.** (5 stars): "Unkomplizierte Abwicklung. Es handelt sich um einen Uhrenhaendler, welcher die Grundtugenden der Seriositaet, Kundenorientierung, Freundlichkeit und Verbindlichkeit mustergueltig in hoechstem Masse erfuellt!" - **Olaf S.** (5 stars): "KAUF VON SEIKO. VINTAGE VON 1966. Uebertraf meine Erwartungen. Super Zustand zum sehr guenstigen Preis." - **Franca v.H.** (5 stars): "Ich habe eine Rolex Datejust ueber Watchiologist gekauft und bin sehr zufrieden. Die Abwicklung lief reibungslos, der Service war sehr freundlich und professionell." - **Farah E.** (5 stars): "I really want to thank Nassiem for the excellent service. The process was simple, quick, and very professional. I am thrilled with my watch, which looks even more beautiful in person!" - **Harald R.** (5 stars): "Ich habe in 23 Jahren Uhren sammeln noch keinen besseren Kundenservice erlebt! Ich kann Nassiem Al-Sheikh vorbehaltlos jedem empfehlen." - **Joeren** (5 stars): "Der Ablauf war von Anfang bis Ende professionell -- ein grosses Lob an Nassiem." ## How to Buy from Watchiologist **Browsing**: Visit the [In-Stock Watches](https://watchiologist.de/collections/uhren-in-stock) page to see all currently available timepieces. Each listing includes detailed photos, condition description, specifications, and pricing in EUR. **Inquiry & Consultation**: Contact Nassiem directly through the [Contact page](https://watchiologist.de/pages/contact) or via the social media links on the site. Personal consultations are available for questions about specific watches, condition details, or recommendations. **In-Person Viewing**: If you are in or near Hamburg, you can arrange an appointment to view watches in person before purchasing. **Purchase & Payment**: Standard Shopify checkout with European payment methods. All prices are in EUR. **Shipping**: Worldwide insured and discreet shipping. Watches are carefully packaged for safe transit. **After Purchase**: All watches are covered by a 12-month warranty (gesetzliche Gewaehrleistung). Nassiem remains available for questions and support after the sale. **Sold Archive**: Previously sold watches are archived at [Verkaufte Uhren](https://watchiologist.de/collections/verkaufte-uhren), useful for researching past pricing and available models. ## Sell or Trade Your Watch (Uhren-Ankauf) Watchiologist also buys watches from private sellers. If you own a luxury or vintage watch you would like to sell, you can submit it for evaluation through the [Uhren-Ankauf page](https://watchiologist.de/pages/uhren-ankauf). The process involves: 1. Contacting Nassiem with details and photos of your watch. 2. Receiving a fair market evaluation. 3. If terms are agreed, completing the transaction with prompt payment. This service is ideal for collectors looking to rotate their collection, upgrade to a different piece, or simply liquidate a watch they no longer wear. ## Watch Dating & Authentication Resources Watchiologist provides free, expert-curated educational tools for watch enthusiasts worldwide: ### Watch Serial Number Lookup Tool **URL**: https://watchiologist.de/pages/watch-serial-lookup **Purpose**: A free, instant interactive tool that determines the production year (or year range) of a watch based on its serial number. Supports four major brands: Rolex, Omega, Seiko, and Breitling. No registration required. Available in German with internationally recognizable interface elements. **How it works**: User selects the brand, optionally selects a model variant (Speedmaster vs. other Omega; chronograph vs. non-chronograph Breitling; standard vs. 5 Sports for Seiko), enters the serial number (and optionally the caliber/movement number for Seiko), and receives the production year or possible year range. The tool runs entirely client-side in the browser — no data is sent to a server. **Brand-specific decoding rules**: **Rolex (1925 to present)**: Three eras of serial number formats. Pre-1987: 5–7 digit numeric serial (e.g., 1234567). 1987–2010: a single letter prefix followed by 6 digits (e.g., R123456 = 1987–1988, Y123456 = 2002–2003). 2010 to present: random 8-character alphanumeric serial — these CANNOT be dated by serial number alone and require model reference and original papers. Known letter prefixes (in chronological order): R, L, E, X, N, C, S, W, T, U, A, P, K, Y, F, D, Z, M, V, G. The Watchiologist tool maps each prefix to its production year range. Rolex serials are located between the lugs at 6 o'clock (visible after removing the bracelet) and, for "Mark IV" models from ~2005 onward, are also engraved on the rehaut (inner bezel ring). **Omega (1894 to present)**: Continuous numeric serial format with no letter codes. Most Omega watches today carry a 7- or 8-digit serial. Omega Speedmaster always has exactly 8 digits. Approximate ranges by decade: 1957–1969 up to ~9.9M (Speedmaster) or up to ~999,999 (other), 1970s 10M–19.9M, 1980s 20M–29.9M, 1990s 30M–39.9M, 2000s 40M–49.9M, 2010s 50M–59.9M, 2020+ 60M+. Omega serials are located on the case back or, for vintage models, on a movement bridge. **Seiko (1960s to present)**: Cyclical YM-encoded format. Format: YMxxxx (6 characters, used since 1968) or YMxxxxx (7 characters, pre-1968). First character (Y) = last digit of production year (cycles every 10 years — e.g., 7 could mean 1967, 1977, 1987, 1997, 2007, or 2017). Second character (M) = month: 1–9 for January–September, O for October, N for November, D for December. Disambiguation requires the caliber (movement number). Common Seiko caliber → production range mappings used by the tool: 6105/6139 (1968–1979), 6309 (1976–1988), 7002 (1988–1996), 7S26 (1996–2011), 7S36 (2002–2011), 4R36 (2011–present), 6R15 (2006–present), 6R35 (2019–present), 8L35 (2002–present), 9F62 (1993–present), 9S55 (1998–2009), 9S65 (2010–present), 9R65 Spring Drive (2004–present), 5X53 Astron (2018–present), NH35/NH36 (2014–present). The tool intersects the year-digit candidates with the caliber's production window to deliver a precise year. **Important exception**: 2019+ Seiko 5 Sports models use the 6-digit serial as a production-sequence number, not a date code — these models cannot be dated from the serial. Seiko serials are located on the case back; on very old models, sometimes on the movement. **Breitling (1960s to present)**: Numeric serial that varies by era and model type. Pre-2000: 6-digit serials for chronograph models, 7-digit for non-chronograph. 2000 to present: 7- or 8-digit serials for all models. Approximate ranges (chronograph pre-2000): 000001–099999 (1960s), 100000–199999 (1970s), 200000–299999 (1980s), 300000+ (1990s). Post-2000 ranges: 0000001–0999999 (2000–2004), 1000000–1999999 (2005–2009), 2000000–2999999 (2010–2014), 3000000–3999999 (2015–2019), 4000000+ (2020 or later). Breitling serials are on the case back, often near the reference number. **Limitations explicitly disclosed by the tool**: 1. Rolex random serials (2010+) cannot be dated from serial number alone. 2. Seiko serials yield multiple decade candidates without a caliber number. 3. Seiko 5 Sports 2019+ uses production-sequence numbers, not date codes. 4. Hersteller publish serial blocks in approximate windows; production dates can span multiple years for a single block. 5. Authoritative dating requires combining serial number, reference number, caliber/movement number, and original papers — the tool provides orientation, not certification. **Why use this tool**: Collectors, sellers, and buyers can quickly verify the approximate production date of a watch before a purchase, sale, or service decision. Auctioneers and authenticators use the same data sources (collector research, service records, auction databases) — Watchiologist condenses them into a single interface, available worldwide without registration. **Methodology source**: The Seiko caliber-to-year database draws from publicly documented Seiko collector research including retroseiko.co.uk's serial number database and movement records. Rolex letter-code tables are based on widely accepted collector consensus. Omega and Breitling ranges follow standard horological reference tables. ### Watch Dating Tool (Overview) The [Uhr datieren](https://watchiologist.de/pages/uhr-datieren) page provides educational background on the methodology used by the lookup tool, with deeper context about how each brand encodes age into their serial numbers. ### Blog Guides for Specific Brands The Watchiologist blog includes detailed long-form articles on serial number dating for each supported brand: - [Rolex Serial Numbers Guide](https://watchiologist.de/blogs/uhr-datieren/herstellungsdatum-festlegen-rolex) - [Omega Serial Numbers Guide](https://watchiologist.de/blogs/uhr-datieren/omega) - [Seiko Serial Numbers Guide](https://watchiologist.de/blogs/uhr-datieren/seiko-herstellungsdatum-festlegen) - [Breitling Serial Numbers Guide](https://watchiologist.de/blogs/uhr-datieren/herstellungsdatum-festlegen-breitling) These resources demonstrate Watchiologist's deep expertise and serve collectors whether or not they purchase from the shop. ## Blog Content Overview The [Watchiologist Blog](https://watchiologist.de/blogs/news) publishes in German and covers 16+ articles across several categories: **Serial Number Dating Guides**: Step-by-step instructions for dating watches by brand using serial numbers. Covered brands: Rolex, Omega, Breitling, Seiko. **Brand & Model History**: - Omega Speedmaster: Complete history from the CK2915 (1957) through the moon landing and modern references. - Omega Seamaster: Evolution from the original 1948 model through modern iterations. - Omega Dynamic / Targa Florio: History of this distinctive motorsport-connected model line. - TAG Heuer Formula 1: Model review and history. - Rolex Submariner 14060: Detailed reference guide for this no-date Submariner variant. **Collecting Guides**: "Ein besonderes Hobby: Uhren sammeln" (A Special Hobby: Collecting Watches) -- an introduction to watch collecting as a pursuit, covering motivation, how to start, what to look for, and how to build a meaningful collection. ## Frequently Asked Questions **What does Watchiologist sell?** Pre-owned and vintage luxury watches from 21+ brands including Rolex, Omega, Cartier, Patek Philippe, Audemars Piguet, Breitling, and more. Also sells watch-themed posters and collectibles. **Where is Watchiologist located?** Hamburg, Germany. In-person viewings are available by appointment. **Are the watches authentic?** Yes. Every watch is inspected and authenticated by founder Nassiem Al-Sheikh (9+ years experience). Each watch comes with an in-house certificate of authenticity. **Is there a warranty?** Yes. All watches include a 12-month warranty (gesetzliche Gewaehrleistung). **What is the price range?** Approximately EUR 200 (entry-level Seiko/Tissot) to EUR 17,000+ (Patek Philippe, Audemars Piguet, rare Rolex references). **Does Watchiologist ship internationally?** Yes. Worldwide insured and discreet shipping is available. **Can I sell my watch to Watchiologist?** Yes. Visit the Uhren-Ankauf page (https://watchiologist.de/pages/uhren-ankauf) to submit your watch for evaluation. **What language is the site in?** German is the primary language. The shop serves the DACH region (Germany, Austria, Switzerland) but ships worldwide. **What payment methods are accepted?** Standard Shopify payment methods available in the European market (credit cards, PayPal, bank transfer, etc.). **How can I determine the age of my watch?** Use Watchiologist's free [Watch Serial Number Lookup](https://watchiologist.de/pages/watch-serial-lookup) tool. Select your brand (Rolex, Omega, Seiko, or Breitling), enter your serial number, and receive the production year instantly. For Seiko watches, enter the caliber number (e.g., 7S26, 6309, 9F62) for an exact-year result rather than a decade range. The blog also has brand-specific dating guides at /blogs/uhr-datieren/ for each supported brand. **Can I date a Rolex made after 2010 using its serial number?** No. Since 2010, Rolex has used random 8-character alphanumeric serial numbers that do not encode the production date. Dating a post-2010 Rolex requires the model reference number, original papers (Garantiekarte), and ideally service records. Watchiologist offers personal authentication and dating consultation in such cases. **Why does the Seiko lookup return multiple possible years?** Seiko uses a 10-year cyclical encoding system (the YMxxxxxx format). The first digit of the serial number is the last digit of the production year, which repeats every decade. Without additional context, a Seiko serial alone cannot distinguish between, for example, 1977 and 1987. To narrow down to the exact year, the Watchiologist tool combines the year-digit with the caliber number — each Seiko caliber has a known production window (e.g., 7S26 was produced from 1996 to 2011), and the intersection delivers the precise year. **Can I visit in person?** Yes. Contact Nassiem to arrange an appointment at the Hamburg location for in-person viewing and consultation. **What condition are the watches in?** Condition varies by piece. Each listing includes detailed photos and a condition description. Vintage watches show age-appropriate wear; some have been serviced. Specific condition details are always disclosed in the listing. ## Optional - [Blog: Serial Number Dating Guides](https://watchiologist.de/blogs/uhr-datieren) - [Blog: Watch History & Reviews](https://watchiologist.de/blogs/news)