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Reference · Serial Numbers

Watch Serial Numbers

Date any watch from its serial number — then find out what it’s worth.

Pick a brand for an instant production-year lookup, the full serial chart, and a guide to where the number is engraved and how to read it. Serial dating is the fastest first check on any pre-owned watch — and the first step to selling one.

Rolex
Sequential, letter-prefix, and random serials — 1926 to today.
Omega
Movement-serial dating from 1894, Speedmaster to Seamaster.
Patek Philippe
Movement & case serials, and when to get the Extract.
Cartier
Era-level dating for Tank, Santos, and Ballon Bleu.
Longines
Serial charts plus the free St‑Imier archive lookup.
Tudor
Rolex-style vintage serials, B/H prefixes, and the 1984 reset.