A Girard-Perregaux reference number is the string of digits stamped on the caseback that tells you the exact model, case material and dial of a watch. If you are buying a Laureato, a Vintage 1945 or a Three Bridges piece from a Japanese seller, that number is the single most useful thing in the listing. It lets you check that the case, dial and bracelet in the photos actually match the reference the seller has written.
This guide explains how a Girard-Perregaux reference number is built, how it differs from the serial number, and how to read both from the caseback of a Japanese listing. Girard-Perregaux does not publish a public serial-number lookup, so remote buyers have to verify by cross-checking the reference against the photos and papers themselves. We set out a seven-step process for doing exactly that, plus the red flags that should make you pause before you pay.
Everything below reflects the current Laureato lineup and public reference catalogues as of 2026. Models, materials and prices change, so treat any specific reference as an example of the pattern rather than a fixed catalogue. This article is written for buyers outside Japan; it is not affiliated with Girard-Perregaux, and the reference codes are read from official product pages and dealer listings, because Girard-Perregaux does not publish an official decoder.
- What a Girard-Perregaux reference number tells you
- Reference number vs serial number: two different numbers
- Laureato reference numbers by collection
- Older and vintage Girard-Perregaux numbers
- Does Girard-Perregaux have a serial number lookup?
- How to verify a Girard-Perregaux from a Japanese listing in 7 steps
- Red flags in a Girard-Perregaux listing
- Why buy a Girard-Perregaux from Japan?
- Reference numbers by brand
- Frequently asked questions
- Summary
What a Girard-Perregaux reference number tells you
A Girard-Perregaux reference number is a coded description of one specific configuration: model family, case metal, dial and bezel, and bracelet or strap. Read it correctly and you know what the watch should be before you look at a single photo. Girard-Perregaux itself does not release a legend for these codes, so the meanings below are read back from official product references and dealer catalogues.
The four segments of a modern reference
Modern Girard-Perregaux references split into four groups separated by dashes. Take the official steel Laureato 42 mm reference 81010-11-3153-1CM as the worked example.
- 81010 — the five-digit model family (here, the Laureato 42 mm three-hand).
- 11 — the case-material code (11 is stainless steel).
- 3153 — the dial and bezel configuration.
- 1CM — the bracelet or strap type and finish variant.
The same logic runs through the range. The Laureato Chronograph reference 81020-11-131-11 is a steel (11) chronograph; the pink-gold Laureato reference 81010-52-436-52A swaps the material segment to 52 and carries a gold bracelet code in the final group. The first two groups are the ones that protect you as a buyer, because they fix the model and the metal.
Case-material codes in the second segment
The second group is the case metal. Three codes are confirmed directly against official and authorized-dealer references; the remaining three are listed by reference catalogues and are consistent with the same pattern.
| Code | Case material | Confirmed by |
|---|---|---|
| 11 | Stainless steel | Official ref. 81010-11-3153-1CM, 81020-11-131-11 |
| 52 | Pink (rose) gold | Dealer ref. 81010-52-436-52A, 81010-52-3333-1CM |
| 21 | Titanium | Ref. 81070-21-491-FH6A (Laureato Absolute) |
| 51 | Yellow gold | Reference catalogue (essential-watches) |
| 53 | White gold | Reference catalogue (essential-watches) |
| 71 | Platinum | Reference catalogue (essential-watches) |
Two cautions. First, Girard-Perregaux uses additional finish variants — for example some steel references carry a different second-segment code for PVD or two-tone treatments — so the metal code is a strong hint, not a legal guarantee. Second, because there is no official published legend, never let the code alone settle a gold-versus-steel question. Confirm precious metal by the hallmark and the case weight, which we return to below.
Reference number vs serial number: two different numbers
The reference number and the serial number are not the same thing, and a Japanese listing will often show both. The reference describes the model; the serial (Girard-Perregaux marks it as the individual number) identifies the single watch. You need the reference to know what the watch is, and you use the serial to check that the papers describe the same physical piece.
Where each number is engraved
On a modern Laureato the caseback is solid, held by six screws, and carries the brand name, the water-resistance rating, the reference and the serial number on a polished ground. That means both numbers are usually legible in a clear caseback photo — which is exactly the photo a careful Japanese seller will provide. On vintage pieces the movement number may sit on the movement itself rather than the outer case, so the two numbers can live in different places.
When you assess a listing, line up three things: the reference on the caseback, the reference printed on the warranty card or box label, and the model in Girard-Perregaux’s current or archived lineup. If any one of them disagrees, ask before you buy.
Laureato reference numbers by collection
The Laureato is the reference most Japanese listings will show, and its family prefixes are consistent enough to memorize. The table below groups the current and recent Laureato prefixes with example references drawn from official and dealer sources.
| Prefix | Laureato model | Example reference |
|---|---|---|
| 81005 | Laureato 38 mm | 81005-11-3460-1CM (steel) |
| 81010 | Laureato 42 mm, three-hand | 81010-11-3153-1CM (steel), 81010-52-3333-1CM (pink gold) |
| 81020 | Laureato Chronograph 42 mm | 81020-11-131-11 (steel) |
| 81070 | Laureato Absolute 44 mm | 81070-21-491-FH6A, 81070-21-001-FB6A (titanium) |
| 80180 / 80189 | Laureato EVO3 (earlier generation) | 80180-1-11-6516 (steel) |
Read the prefix first. If a seller lists a 42 mm case but the reference begins 81005, or lists a chronograph but the prefix is 81010, the description and the watch are not the same object. That mismatch is the most common honest error in cross-border listings, and it is also the easiest to catch.
Older and vintage Girard-Perregaux numbers
Not every Girard-Perregaux in the Japanese market is a modern Laureato. Japan holds deep stock of 1990s and 2000s references, and some genuinely antique pieces. The numbering logic shifts as you go back.
Vintage 1945 and World Time prefixes
The rectangular Vintage 1945 line uses a 25xxx prefix — for example 25830 for a steel Vintage 1945 on a strap, and 25975 for a Vintage 45 King Size Chronograph in white gold. The world-time and travel complications use a 49xxx prefix, such as 49800 for a World Time Chronograph. These follow the same four-segment idea, though the exact grouping can vary on older catalogue numbers.
Serial dating on genuinely antique pieces
For nineteenth- and early-twentieth-century Girard-Perregaux pocket watches and chronometers, collectors date the piece by the movement serial number rather than a modern reference. Published data points run from roughly serial 8811 around 1847 to serial 46363 around 1868 and serial 87319 around 1880, based on known-example tables. These are movement numbers on antique watches; they do not map to modern wristwatch references and should not be used to date a Laureato.
Does Girard-Perregaux have a serial number lookup?
No. Girard-Perregaux does not offer a public serial-number lookup tool, and there is no online database where you can type a serial and confirm a model or production year. This is the same situation as most grail-tier brands, and it is why remote verification rests on the reference number and the papers rather than an official check.
For a vintage or historically significant piece, authentication and dating go through Girard-Perregaux’s own heritage and restoration service, which can consult the brand archives. For a modern watch, the practical chain of proof is the reference and serial on the caseback, matched to the warranty card, the box label and the current lineup. If a seller claims a definitive year from the serial alone, treat it as an estimate, not a fact.
How to verify a Girard-Perregaux from a Japanese listing in 7 steps
Japanese platforms — dealer sites, Yahoo Auctions Japan, and used-watch specialists such as Komehyo or Jackroad — usually give you enough photos to run these checks remotely. Work through them in order before you commit.
- 1. Read the reference on the caseback. Ask for a sharp, straight-on caseback photo and transcribe the full reference, all four groups.
- 2. Match the prefix to the model. Confirm the five-digit prefix matches the collection and case size the seller describes (81010 for a 42 mm three-hand, 81020 for a chronograph, and so on).
- 3. Check the material code against the case. The second group should agree with the stated metal. For gold or platinum, ask for a hallmark photo and the case weight, and do not rely on the code alone.
- 4. Compare reference to papers. The reference on the caseback must match the warranty card and box label. A card for a different reference is a red flag, not a rounding error.
- 5. Note the serial (individual number). Record it from the caseback and confirm it is legible and not partly polished away.
- 6. Look for over-polishing. The Laureato’s octagonal bezel and integrated bracelet have crisp edges; rounded facets and a thin lug profile signal heavy polishing that no reference number will reveal.
- 7. Confirm the movement where possible. If the listing states an exhibition-back model, ask for a movement photo and check the caliber matches the reference; many Laureato models have a solid back, so this is not always possible.
For the paperwork side of this, our guide on verifying a warranty card from photos applies to any brand, and the checks in confirming a watch’s service history matter just as much for a Girard-Perregaux, because a brand service can quietly replace parts.
Red flags in a Girard-Perregaux listing
None of these on their own proves a problem, but each is a reason to ask more questions before paying.
- The reference on the caseback does not match the reference on the warranty card or box.
- The material code says gold but there is no hallmark photo and no case weight.
- The prefix does not match the case size or complication described in the title.
- The serial number is missing, obscured, or looks re-stamped.
- The bezel facets and bracelet edges look soft, suggesting an over-polished case.
- The seller promises a firm production year from the serial number alone.
Why buy a Girard-Perregaux from Japan?
Japan has been a strong Girard-Perregaux market for decades, so the domestic used channel carries Laureato, Vintage 1945 and Three Bridges references that are thin on the ground elsewhere. Japanese dealers also tend to document condition carefully and photograph the caseback clearly, which is precisely what a remote buyer needs to run the reference checks above.
The trade-off is distance. You cannot handle the watch, so the reference number, the papers and the photos have to do the work an in-person inspection would normally do. That is the whole reason this decoding guide exists: with the reference read correctly, most of the risk in a cross-border purchase is visible before you pay.
Reference numbers by brand
Girard-Perregaux sits in our wider series on decoding grail-tier reference numbers from Japanese listings. If you are comparing several brands, these companion guides use the same verification method:
- Vacheron Constantin reference numbers
- A. Lange & Söhne reference numbers
- Audemars Piguet reference numbers
- Patek Philippe reference numbers
Frequently asked questions
Where is the reference number on a Girard-Perregaux?
On modern models it is engraved on the caseback, alongside the brand name, water-resistance rating and serial number, on a polished ground. A clear straight-on caseback photo will show all four segments of the reference.
What does the second group in a Girard-Perregaux reference mean?
It is the case-material code. Confirmed examples include 11 for stainless steel, 52 for pink gold and 21 for titanium; reference catalogues also list 51 for yellow gold, 53 for white gold and 71 for platinum. Girard-Perregaux does not publish an official legend, so confirm precious metals by hallmark and weight.
Can I check a Girard-Perregaux serial number online?
No. Girard-Perregaux has no public serial-number lookup. Verification of a vintage piece runs through the brand’s heritage and restoration service; for a modern watch, match the reference and serial on the caseback to the warranty card and box.
How do I know a Laureato reference matches the photos?
Read the five-digit prefix first. 81005 is the 38 mm Laureato, 81010 the 42 mm three-hand, 81020 the 42 mm chronograph and 81070 the Absolute. If the prefix and the described case size or complication disagree, the listing is inconsistent.
Is a Girard-Perregaux from Japan authentic?
A genuine watch is authentic regardless of where it is sold, but authentic is not the same as authorized. Most Japanese used-market pieces are not authorized-dealer stock; they are pre-owned watches that you verify by reference, serial and papers rather than by dealer network.
Summary
- A Girard-Perregaux reference has four groups: model family, case material, dial and bezel, bracelet or strap.
- Confirmed material codes are 11 steel, 52 pink gold and 21 titanium; catalogues add 51 yellow gold, 53 white gold and 71 platinum.
- The reference describes the model; the serial (individual number) identifies the single watch. Both sit on the modern caseback.
- There is no public Girard-Perregaux serial lookup; verify by matching the caseback to the warranty card, box and current lineup.
- Read the Laureato prefix first (81005 / 81010 / 81020 / 81070) and confirm precious metals by hallmark and weight, not the code alone.
If you are looking for a specific Girard-Perregaux reference, RYUZU WATCHES searches the Japanese market on your behalf and inspects the watch before you commit. Send us the reference you are after and we will report back on what is available and how it checks out.
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