Free reference tools
Luxury serial number and date code checkers
Choose a brand to decode a supported date code, serial range, blind stamp, or caseback marking. Every check runs in your browser and is available without an account.
Why use the checker
21 brand guides
One clear checker for each supported marking system.
Free and open
No sign-in, payment, or account creation is required.
Honest results
Dates and eras are clues—not claims that an item is genuine.
Select a brand
Find the marking you want to check
Results reflect published and commonly documented code systems. Some brands encode a precise date; others only indicate an era or do not encode a date at all.
A matching code is only one piece of evidence
Serial systems can overlap, change, or be copied. These free tools help you understand a marking; they do not authenticate the item or replace a review of materials, construction, hardware, and provenance.