Short answer
"Fake Cartier Tumbaga V9" is a seller label. It is not a Cartier term. The phrase stacks three things: a counterfeit Cartier case shape, an alloy called tumbaga, and a version number a replica factory gave its own batch. Cartier has no tumbaga watch in its catalog. The word tumbaga comes from pre-Columbian metalwork. V9 comes from the replica trade.
What tumbaga is
Tumbaga is a gold and copper alloy. Metalsmiths in Colombia, Panama, and Peru used it for more than 1,000 years before Spanish contact. Copper content ran high. Gold content ranged from about 10% to 70%, set by the workshop and the object.
Fake Cartier Tumbaga V8: A Comprehensive Guide
The alloy melts at a lower temperature than pure gold. It also holds shape better under a hammer. Casters used it for figures, nose ornaments, and vessels. Smiths then treated the surface with acid and heat to draw gold outward, a process called depletion gilding. The result looked like solid gold at a fraction of the metal cost.
Numbers that matter
- 18k gold: 75% gold by weight
- 18k rose gold: about 75% gold, 22% copper, 3% silver
- Tumbaga: copper-dominant, gold content varies, often below 50%
- Hardness: copper-rich alloy scratches deeper than 18k gold
Why a replica seller uses the word
Gold color on a replica comes from one of two builds. One is a brass or steel case with a plated layer. The other is a solid alloy that already carries gold tone through the metal. The second build costs more, and sellers name it to justify price.
Calling the alloy tumbaga borrows history. It sounds older and rarer than brass. No assay report ships with the watch. Ask the seller for gold content by percentage and plating thickness in microns. If the answer is a slogan, treat the claim as unverified.
What V9 means
Replica factories tag batches with letters and numbers. Codes run from V1 through V9 and beyond. No registry governs the tags. Two sellers can ship different watches under the same V9 label. A higher number marks a newer batch from the same source, not a better watch.
Items that change between batches: case thickness, lug shape, dial print, crystal height, bracelet end links, clasp engraving. Ask for photos of the unit in hand. Stock images show nothing.
Checks you can run at home
- Magnet test. A strong magnet should not pull on solid gold or copper alloy. It will pull on a steel case. Steel with gold plate is the usual build.
- Weight. Gold alloy feels heavy for its size. Brass comes close. Steel feels light.
- Lug edges. Plating wears at contact points. Rub marks that show gray metal under the gold point to plating over steel.
- Caseback marks. Cartier stamps a reference number, a serial, and a metal mark. Fakes reuse one serial across many units.
- Skin marks. Copper alloy in contact with sweat leaves a green stain. That signals copper, not tumbaga.
None of these checks measure gold content. That takes X-ray fluorescence or an acid test at a jeweler. Expect a small fee and a written result.
Care and limits
Copper-bearing alloy tarnishes. Store the watch dry. Wipe sweat off after wear. Keep it away from chlorine and perfume. Plating thickness sets service life: 3 microns wears through in months on a daily-worn bracelet, 10 microns lasts longer.
On resale the label carries no value. Cartier does not service replica watches. Parts for a genuine reference often will not fit a copy. Buy the watch you can inspect, not the batch code.