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.

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20 brand guides

One clear checker for each supported marking system.

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Honest results

Dates and eras are clues—not claims that an item is genuine.

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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.

Returns a year
Hermès
Read a blind-stamp letter together with its circle, square, or unframed shape.
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Returns a year
Dior
Decode the interleaved month and year found in Dior date-code groups from 1997 onward.
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Returns a year
Gucci
Classify classic serial layouts and date supported black fabric tag codes from 2014 onward.
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Returns a year
Louis Vuitton
Read factory letters and production month or week from date codes used through March 2021.
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Returns a year
Balenciaga
Use the interior tag letter and bag era to identify a production season from 2003 onward.
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Era only
Fendi
Use the interior marker type to place the item before 2004, in a hologram era, or in the RFID era.
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Era only
Chanel
Map six- to eight-digit sticker series to an indicative production window from 1984 to 2022.
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Era only
Rolex
Estimate an era from sequential or letter-prefix serials; randomized serials cannot be dated.
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Returns a year
Coach
Read the month, year, plant, and style portions of supported creed numbers from 1994 onward.
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No date encoded
Prada
Recognize a plausible interior serial while explaining why Prada serials do not contain a production date.
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Returns a year
Bottega Veneta
Read the four-digit year on supported older tags and classify later originality-code formats.
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Returns a year
Saint Laurent
Decode the month-and-year suffix used on supported bags after the 2012 Saint Laurent rebrand.
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Returns a year
Goyard
Decode the six-digit production date that follows the three-letter origin group.
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Returns a year
Cartier
Read supported pre-2009 watch serials and identify later randomized or non-dating formats.
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Returns a year
Omega
Estimate a production window from the long-running numeric serial sequence used by Omega.
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Returns a year
Panerai
Read the millesimation letter used from 1998 to 2023 and distinguish other caseback numbers.
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Returns a year
Longines
Estimate production from Longines' published sequential records through serial 15,000,000.
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Returns a year
IWC Schaffhausen
Map sequential watch serials to a reference year or window through approximately 1974.
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Returns a year
Jaeger-LeCoultre
Place a numeric serial within a compiled production window while preserving the table's uncertainty.
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Returns a year
Vacheron Constantin
Estimate a production window from the historical sequential record and flag values beyond it.
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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.

Luxury serial number and date code checkers

Why use the checker

Find the marking you want to check

A matching code is only one piece of evidence