Tools
CloseWhat year is my Casio?
Pick the brand. Type the number. We’ll tell you when it was most likely made.
G-Shock and other Casios carry a small production code: the day of the year, and a letter for the year.
How well the number tells the year
RoughlyRoughly: the code gives the day and the year within a decade. The model narrows the decade.
Where to look
- A short code of numbers and letters is stamped on the case back, often near the edge.
- The module number, like 3229, sits in a small box on the case back.
Ask the maker
Casio doesn’t offer a public archive. The warranty card date is the best record.
Questions
Where is the serial number on Casio watches?
A short code of numbers and letters is stamped on the case back, often near the edge. The module number, like 3229, sits in a small box on the case back.
Can the serial number tell me when my Casio was made?
Roughly: the code gives the day and the year within a decade. The model narrows the decade. G-Shock and other Casios carry a small production code: the day of the year, and a letter for the year.
Does Casio keep official records of its watches?
Casio doesn’t offer a public archive. The warranty card date is the best record.
Does a matching serial number prove my Casio is genuine?
No. Real serial numbers are copied onto fakes, so a number that looks right proves nothing on its own. This lookup only estimates when a watch was made. For a proper opinion on authenticity, have the watch inspected with the case back open.
Every answer here is approximate and given to the best of our knowledge, from charts published by dealers and collectors. Watchmakers rarely publish their own.
A correct number doesn’t prove a watch is genuine. For a proper opinion on your watch, bring it in for an inspection, or read how to tell if a watch is genuine.
What you type stays on your device. Nothing is sent to us or anyone else. Please don’t post your full serial number online.
Last checked against the published charts on 5 November 2026.