Timex Date Code Lookup
From 1985 onward, most Timex watches carry a tiny two-character date code on the caseback: the first character is the year, the second is the month. Enter yours below to decode it, or read on for the dial-code and pre-1968 systems — and an honest look at why some Timex watches simply can't be dated from a code at all.
Timex Date Code Decoder
Enter the two-character code from your Timex caseback (1985 onward), e.g. 37, B3 or H0. You can also paste a long vintage dial number (1963–1993) — the tool reads the last two digits as the year.
Because Timex reused its code cycles, some codes map to two possible eras. The decoder shows both and explains how to tell them apart using your watch's movement and style. Not every Timex was date-stamped — see the dating-without-a-code guide below.
Timex is unusual among watch brands: it never used traditional unique serial numbers, so what you find stamped on a Timex is a date and identification code, not a per-watch serial. There have been three main systems over the decades — a pre-1968 ink stamp inside the caseback, a dial reference number on mechanical watches (1963–1993), and the two-character caseback code used from 1985 onward. Each is decodable, but Timex applied them inconsistently across factories and models, so a fair number of watches carry no readable code at all. This guide covers all three systems, gives you a working decoder for the caseback code, and shows how to date a Timex from other clues when the code is missing.
Where the date code is on a Timex
On watches from 1985 onward the date code is a tiny two-character stamp on the outside of the caseback — often only a millimetre or two tall, tucked near the edge below the model and water-resistance text. On many mechanical models the useful number is instead printed at the bottom of the dial. Check both places.
How the 2-character code breaks down
The rule is simple: first character = year, second character = month. From 1985 to 1992 both characters are numbers; from 1993 the year became a letter while the month kept a compact digit-or-letter scheme.
The month character (letter-cycle years, 1993–2013 & 2022 on)
- 1 — January
- 2 — February
- 3 — March
- 4 — April
- 5 — May
- 6 — June
- 7 — July
- 8 — August
- 9 — September
- 0 — October
- =prefix — November
- next — December
A single character can't hold "10", "11" or "12", so October becomes 0, November repeats the year letter (e.g. BB = Nov 1994), and December uses the next letter in the sequence (e.g. BC = Dec 1994). In the numeric years (1985–1992, 2014–2021) the code is simply a running number 01–96, twelve per year.
The four code eras (and why codes repeat)
Timex has alternated between a numeric cycle and a letter cycle. Each cycle has been used twice, which is the single biggest source of ambiguity when dating a modern Timex — the same code can point to two different decades.
The vintage dial number (1963–1993)
Most mechanical Timex watches from 1963 until mechanical production ended in 1993 carry a long reference number at the bottom of the dial. The best part: the last two digits are the year directly — no decoding. Everything before it identifies the model and movement.
Pre-1968 ink stamp. Some earlier Timex watches instead have a faint ink-stamped code inside the caseback made of one letter and one number. Here the number gives the year on an inverted scale: 8=1959, 7=1960, 6=1961, 5=1962, 4=1963, 3=1964, 2=1965, 1=1966, 9=1967. These stamps are easily rubbed away, so many survivors show nothing.
No readable code? Date it from other clues
Timex did not date-stamp consistently, and codes fade or wear away. When there is no code to read, this flow gets you to a decade using the clues almost every Timex still shows.
Identify and value your Timex in 60 seconds
A date code tells you when, but not what it's worth or whether it's all original. Upload photos of your Timex — dial, caseback, and movement if you can open it — and get an AI identification, era estimate, and market valuation. Especially handy for vintage mechanical models where the code has worn away.
Start AuthenticationReading a faint or worn code
The number one reason a Timex "has no code" is that the stamp is simply too faint to read. Timex codes are shallow by design, and decades of wrist contact rub them down. Here is what a fresh code versus a worn one looks like — and why you shouldn't assume the code is missing until you've checked under angled light.
Sharp, well-defined characters. Read it straight off: prefix B, month 3.
Rubbed flat and grey. Tilt under a lamp so the shallow engraving catches shadow before deciding there's no code.
What the code can and can't tell you
It dates, it doesn't authenticate
A Timex date code is an identification code, not a unique serial number. Two identical watches made the same month share the same code, so a code can never prove that a specific watch is genuine. It tells you roughly when and what, which is exactly what you want for dating — but authenticity rests on the movement, dial printing, case construction, and overall correctness of the parts.
Ambiguity is built in — resolve it with the movement
The repeating cycles mean a numeric code like 37 is either 1988 or 2017, and a letter code like B3 is either 1994 or 2023. The tell is almost always the movement: a hand-wound or automatic mechanical Timex belongs to the earlier era, while a quartz analog, Indiglo, or digital module belongs to the later one. Indiglo, for example, only arrived in the early 1990s, so an Indiglo watch with a numeric-looking code sits in the 2014–2021 cycle, not the 1980s.
Be honest about the limits
Timex applied its codes inconsistently across models and factories. Some watches never got a caseback code; on others it has worn away; and a few late or licensed pieces don't follow the cycles cleanly. A decoded code is a strong estimate, not a certificate. When it disagrees with the styling or movement, trust the physical evidence and treat the code as one vote among several.
Timex date code FAQ
How do I find the date code on a Timex?
From 1985 on, look for a tiny two-character code on the outer caseback, near the edge below the model and water-resistance text. On mechanical watches (1963–1993) read the last two digits of the long number at the bottom of the dial instead. Some pre-1968 watches have an ink-stamped letter-and-number code inside the caseback.
How do I read the two-character caseback code?
First character = year, second character = month. 1985–1992 uses numbers 01–96 (twelve per year). 1993–2013 uses a letter prefix with months as 1–9 (Jan–Sep), 0 (Oct), the prefix letter repeated (Nov), and the next letter (Dec). Both cycles repeat — numeric from 2014, letters from 2022 — so a code can point to two eras.
How old is my Timex if it has no date code?
Date it from other clues: the model/catalog number, the "Made in" marking, the movement caliber, and dial, case, and logo styling. These place any Timex within a decade even with no code, which is often the best you can do — and honestly, plenty of Timex watches have no readable code at all.
Does a Timex have a serial number?
No. Timex used identification and date codes rather than unique per-watch serials, so the codes tell you when and what, not which individual watch.
Why does my code decode to two possible years?
Because the numeric cycle (01–96) ran 1985–1992 and again from 2014, and the letter cycle (A–Y) ran 1993–2013 and restarted in 2022. The same characters repeat, so use the movement and styling to pick the correct decade.
Does the code prove my Timex is genuine?
No. It helps date and identify the watch but never proves authenticity on its own. Confirm that with the movement, dial printing, case, and — for anything valuable — an in-person inspection.
Is Timex dating always accurate?
No. Timex did not date-stamp consistently, codes are often faint or absent, and the cycles overlap. Treat a decoded code as a strong estimate to cross-check against the model, movement, and "Made in" marking.
Important Note
Date codes are one signal among several, and Timex applied them inconsistently. Combine a decoded code with the model number, movement type, "Made in" marking, and styling before settling on a date. For a valuable vintage piece or a suspected franken build, an in-person inspection by a certified watchmaker is always the gold standard.
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Start ScanningFor high-value or vintage pieces, we recommend pairing your AI scan with an in-person inspection by a certified watchmaker.