What the Hermès Blind Stamp Actually Tells You
The blind stamp is a small mark pressed into the leather of an authentic Hermès bag, indicating the production year. It's called "blind" because the mark is debossed — pressed into the leather without ink, visible only as a physical impression.
Understanding the blind stamp serves two functions: it helps date a bag accurately (a Birkin from 2003 has different market dynamics than one from 2019), and it's one of the authentication checks that fakers consistently get wrong.
The stamp system has evolved since its introduction. The format of the mark — specifically whether the letter sits alone, inside a circle, or inside a square — encodes the year range. Knowing which format corresponds to which era is essential, because an incorrect combination is definitive proof of a fake.
Where to Find the Blind Stamp by Model
The stamp location varies by model and production era. An authentic bag's stamp will be in exactly the expected location.
| Model | Pre-2016 Location | Post-2016 Location |
|---|---|---|
| Birkin | On the strap, under the buckle | Inside the bag, on the left leather panel |
| Kelly | On the strap, under the buckle | Inside the bag, on the left leather panel |
| Mini Kelly | Inside, near the inner pocket | Same location |
| Lindy | Inside the bag on the interior panel | Same location |
| Mini Lindy | Inside the side pocket | Same location |
| Evelyne | On the strap, under the flap tab | Same location |
| Constance | Inside, on the inner partition at upper corner | Same location |
| Picotin | Inside the bag body | Same location |
| Bolide | On the interior leather tab | Same location |
A stamp that's in the wrong location for its claimed year is a significant authentication concern.
The Complete Blind Stamp Alphabet: 1945–Present
1945–1970: Unframed Single Letter
No enclosing shape — just the letter alone, pressed into the leather.
| Letter | Year | Letter | Year |
|---|---|---|---|
| A | 1945 | N | 1958 |
| B | 1946 | O | 1959 |
| C | 1947 | P | 1960 |
| D | 1948 | Q | 1961 |
| E | 1949 | R | 1962 |
| F | 1950 | S | 1963 |
| G | 1951 | T | 1964 |
| H | 1952 | U | 1965 |
| I | 1953 | V | 1966 |
| J | 1954 | W | 1967 |
| K | 1955 | X | 1968 |
| L | 1956 | Y | 1969 |
| M | 1957 | Z | 1970 |
1971–1996: Letter Inside a Circle
The same A–Z sequence, but the letter is enclosed in a circle. A⊙ = 1971, B⊙ = 1972 … Z⊙ = 1996.
1997–2014: Letter Inside a Square
Same A–Z sequence again, with the letter enclosed in a square. A□ = 1997, B□ = 1998 … R□ = 2014.
| Letter | Year | Letter | Year |
|---|---|---|---|
| A□ | 1997 | J□ | 2006 |
| B□ | 1998 | K□ | 2007 |
| C□ | 1999 | L□ | 2008 |
| D□ | 2000 | M□ | 2009 |
| E□ | 2001 | N□ | 2010 |
| F□ | 2002 | O□ | 2011 |
| G□ | 2003 | P□ | 2012 |
| H□ | 2004 | Q□ | 2013 |
| I□ | 2005 | R□ | 2014 |
2015–Present: Unframed Letter (Non-Sequential)
Starting in 2015, Hermès abandoned the predictable alphabetical sequence and stopped using enclosing frames. The letters no longer follow A–Z — Hermès uses letters in a random sequence that is not publicly disclosed.
| Letter | Year |
|---|---|
| T | 2015 |
| U | 2016 |
| D | 2017 |
| Y | 2018 |
| Z | 2019 |
| A | 2020 |
| B | 2021 |
| C | 2022 |
| H | 2023 |
| I | 2024 |
Note: Some letters overlap between the pre-1970 era and the post-2015 era — for example, "A" without a frame was used in both 1945 and 2020. To distinguish them, physical examination of the bag is required: a 1945 bag has dramatically different leather aging, hardware, and construction than a 2020 bag.
Using the Blind Stamp for Authentication
Step 1: Confirm the Location
Find the stamp in the expected location for the model. A Kelly with the stamp in the wrong place — say, on the back of the exterior leather rather than on the strap — is immediately suspicious.
Step 2: Identify the Frame Format
Is the letter alone (no frame), inside a circle, or inside a square? The frame format must match the implied year:
- No frame: 1945–1970 or 2015–present
- Circle: 1971–1996
- Square: 1997–2014
A bag with a square-framed letter N was made in 2010. A bag with an unframed N was made in 1958. These are very different bags — physical characteristics must match whichever era is claimed.
Step 3: Cross-Reference Physical Characteristics
The leather, hardware, stitching, and overall construction should be consistent with the implied production year. A bag with a 2003 stamp should have hardware and leather consistent with Hermès production in that period — not brand-new-looking components.
Step 4: Inspect Stamp Quality
Authentic blind stamps are:
- Deep and clean: The impression is substantial and clearly defined
- Even across all parts of the letter: No area of the letter that's lighter or shallower than the rest
- Properly oriented: The letter sits upright and the frame (if present) is centered around it
- No ink or paint: The blind stamp is purely a physical impression — no color added to make it more visible
Fake stamps are frequently:
- Shallow — barely visible without angled light
- Uneven depth — some parts of the letter clearer than others
- Slightly misaligned within the frame
- Smudged or with irregular letter edges
What the Stamp Cannot Tell You
The stamp alone doesn't prove authenticity. Fakers stamp their bags. What makes the combination of stamp + physical markers so powerful is that getting both right simultaneously is much harder. A fake might have a correct stamp but wrong leather. A fake might have quality leather but a wrong frame format.
The stamp narrows the field — it's inconsistencies between the stamp and physical characteristics that expose fakes most reliably.
Authentication Checklist
- Stamp in the correct location for the model and era
- Frame format matches the claimed production year
- Letter is consistent with known Hermès date sequences
- Stamp is deep, even, and clean — no shallow or blurry areas
- Physical characteristics (leather, hardware, construction) match the implied era
- No ink or color added to the stamp
FAQ
What does it mean if I can't find the blind stamp?
The stamp may be hidden under the buckle of the strap (where it should be on pre-2016 Birkins and Kellys). Try lifting the buckle with a light. On very old bags (pre-1945), no stamp was used — which is correct for that era. If you genuinely cannot find a stamp on a post-1982 Birkin, Kelly, or other common model, that's a concern worth investigating through professional authentication.
My bag has a stamp that doesn't appear in any table I've found. Is it fake?
Post-2015 stamps use a non-public sequence. If you have an unframed letter that appears to be from the 2015+ era, cross-reference the physical condition and age of the bag. If the hardware and leather look very new (indicating recent production), an unframed letter is consistent with the 2015+ system. You can use our Hermès date code tool to look up current year codes.
Can the same letter appear in multiple eras?
Yes — letters repeat across the three systems. An unframed "A" could be 1945 or 2020. A circled "C" is 1973. A squared "C" is 1999. The frame format determines the era — the letter alone doesn't uniquely identify the year. This is one reason physical inspection is always required alongside stamp reading.
Does the blind stamp indicate where the bag was made?
No. The blind stamp is only a production year indicator. Unlike Louis Vuitton's date codes, Hermès stamps don't include factory location information. All authentic Hermès bags are made in France — the interior leather square embossed with "HERMÈS PARIS MADE IN FRANCE" confirms this.
How can I tell if a stamp is authentic vs. tooled by a fake maker?
Authentic Hermès stamps are pressed by a specific tool that creates a precise, consistent impression. The letter shape and the frame (if present) should have geometrically consistent proportions. Faked stamps are frequently pressed with inferior tools — the result is a letter that's slightly asymmetrical, a frame that's not perfectly circular or square, or depth that varies across the stamp area. In-person examination in angled light makes these differences visible.
