The short answer
If you are searching for a fake Baignoire Allongée, the buying advice is blunt: there is no version of that purchase worth making. The Baignoire Allongée is an elongated oval-cased Cartier watch in solid gold, and that curved case is the hardest element for a counterfeiter to reproduce and the fastest element for you to inspect. Counterfeit watches are illegal to import into the United States, Cartier and authorized watchmakers will not service them, most contain no gold at all, and they carry no warranty, no verifiable serial number, and no resale market. If the shape is what you love, buy an authentic piece from an authorized dealer or a documented pre-owned example, or put the same budget into a legitimate oval or cushion-shaped watch from a brand that will stand behind it for decades. This guide explains how the genuine watch is built and where fakes fall apart, so you can protect yourself either way.
What the genuine Baignoire Allongée actually is
Cartier introduced the bathtub silhouette in 1912, and the Allongée is the stretched reading of it: a long, shallow ellipse that curves like a tub seen from above. Production examples come in yellow gold, rose gold, white gold and platinum, with a cabochon set into the crown, Roman numerals on a silvered dial, and a case back domed to sit against the wrist.
Case and proportions
Smaller references run roughly 19 to 20 mm across and 27 to 29 mm from end to end. Larger references measure about 23 to 25 mm by 32 to 33 mm. Case height stays under about 9 mm on most versions. The oval is geometric rather than decorative: the curve tightens toward the ends instead of staying a constant radius, and the lugs flow out of the case rather than being soldered on as separate horns.
Materials, stamps and markings
- 18k gold hallmarks stamped into the case back and the buckle, with the fineness mark for the alloy used.
- Reference and serial numbers engraved into the metal, crisp at the edges under magnification.
- A cabochon set flush to the crown, with a clean bezel around it and no glue visible at the seam.
- Dial printing that holds even stroke width on every numeral, including the small ones near the curve.
Where counterfeits fail
Most counterfeit ovals start as a cast or stamped blank that is then polished, which is why the silhouette gives them away first.
- Silhouette. The ends flatten out or the whole case reads as a symmetric pill shape instead of a stretched bathtub curve.
- Dial. Roman numerals vary in weight, the brand script sits too heavy or too thin, and the printed minute track wanders off the curve.
- Cabochon. Plastic or glass, often a flat uniform blue with a visible setting ridge.
- Weight. Gold is dense. A plated case in the same dimensions feels light in the hand and warm quickly to body temperature.
- Movement. Many authentic Baignoire references are quartz, so a ticking seconds hand proves nothing. Judge the case back engraving, the crown action, and the finish of the parts you can see.
What to check before money changes hands
- Ask for the reference and serial numbers, then have them verified by a Cartier boutique or an independent watchmaker who handles the brand.
- Confirm the hallmarks with a jeweler who can test the metal, not just look at it.
- Request service history. A watch that has never been opened is a good sign; a case back with tool marks and no paperwork is not.
- Compare the case profile against photographs of the same reference, paying attention to the ends and the crown.
- Meet at a watchmaker's bench if you are buying privately, so the movement can be seen before payment.
Pitfalls to avoid
- Customs seizure. Counterfeit trademarked goods can be detained and destroyed, and the buyer can face penalties.
- No service path. Independent watchmakers often refuse counterfeit work because parts are not available and the case metal cannot be refinished reliably.
- Resale dead end. There is no legitimate secondary market for a counterfeit, so the money does not come back.
- Plated cases sold as solid gold, which is a straightforward misrepresentation you can test.
- Listings that borrow photos of genuine watches and ship something else.
FAQ
Are super clone Baignoire Allongée watches accurate?
They can look close in a photograph taken straight on. The differences show up in profile, in weight, in the crown, and in the metal itself, which is where authentication work happens.
Will an authorized watchmaker service a counterfeit?
No. Brands service only authentic product, and independent watchmakers face parts and liability problems with counterfeit cases.
Is buying a counterfeit watch illegal in the United States?
Importing counterfeit goods is prohibited and shipments can be seized. Selling them creates real civil and criminal exposure, which is why reputable dealers never touch them.
What is a legal alternative to the oval shape?
Several established brands build oval and cushion cases in steel or gold with full service networks. You get the silhouette and an actual warranty.