The Casio watch date tool

Date a Casio watch using serial number, batch code or module number

Where available, along with some date information this tool will return links to manuals or battery information. Casio have not consistently use serial numbers on their watches so there are three possible options to help narrow down the date of your Casio watch.

Certain high end Casio watches (including many G-Shock models) do use a serial number, its nearly always 6 characters long and found on the back of the watch. The second character can be an O, N or D but the rest are normally numbers.

Modern solar powered Casios may contain a batch code, its 8 characters long and contains numbers and letters, the last character will always be a letter. To my knowledge only solar models will ever have this code.

If you have neither of these then your last option is the production dates for the watch module used, for this I have collated the release dates of as many Casio models as I could find (over 1600 so far), to search this list you need to use the module code that is contained within an etched box on the back of the watch. You do not need to open the watch for any of these codes. If they are not on the caseback, you don't have one.

Please enter whichever codes you can find on your watch and click decode :-
Serial number: (Currently only supports 6 chr serials)

Batch code:

Module code: (The number with a box around it)

If you believe any information is incorrect or you have any information to help make this tool more accurate please contact me, I am particularly interested in finding information about when modules were discontinued. Any input is appreciated, all my tools have always been and will always remain free to use.