The phrase "fake Rotonde Earth & Moon V8" refers to a replica of the Cartier Rotonde de Cartier Earth and Moon, sold by dealers who tag batches with version numbers. V8 is a seller label. It is not a Cartier reference, not a registered factory name, and not a standard shared across sellers. Two listings with the same V8 tag can hold different movements, cases, and dials. Anyone who says V8 is a fixed specification is guessing.
The original watch
Cartier builds the Rotonde de Cartier Earth and Moon with a hand-wound tourbillon caliber, listed as 9440 MC. The tourbillon sits at 6 o'clock. A moon display sits at 12 o'clock under a small aperture. A pusher on the case band moves a dark disc across that aperture, so the wearer can switch between a moon view and a covered view. Published case sizes for the original sit near 47 mm. Confirm the reference number before you compare any spec sheet.
Fake Rotonde de Cartier Earth and Moon V9
What the V8 label covers
Version numbers in the replica trade come from sellers. There is no public registry of batches, no factory disclosure, and no third-party test data for a "V8" unit. Labels such as V6, V7, V8, and "plus" get reused and reassigned. Treat any version number as a claim, not a fact.
Specs to verify in a listing
- Case width. Measure the case. Do not trust the photo.
- Movement. Ask for video of the tourbillon cage completing one turn per minute.
- Moon disc. Press the pusher and watch the disc move under the aperture.
- Crystal. Sapphire resists scratches. Mineral does not.
- Caseback. Check engraving depth and reference text.
- Weight. A steel case weighs far less than platinum or gold.
- Water resistance. Replica cases come with no test results.
Tourbillon claims
A working tourbillon is a costly assembly. Cheap listings that show an open balance wheel at 6 o'clock are not showing a tourbillon. The balance oscillates. The cage rotates. Watch for motion in one axis only.
U.S. customs and law
Counterfeit goods that carry a protected trademark cannot be imported into the United States. CBP can seize and destroy shipments. Card networks and payment processors bar counterfeit sales, so a buyer who receives a wrong or broken unit has little recourse. Selling a replica as genuine is fraud.
What is not known
No public source names the workshop behind any V8 batch. No sales figures exist. No lab has published timing or finish data for these replicas. A seller who quotes those numbers is inventing them.