Short answer
"Rotonde 4061 longtail automatic" is a search string, not a model name. It joins three parts: Rotonde, the Cartier round case shape; 4061, a number that does not appear in Cartier's public reference lists; and longtail, an SEO term for a low-volume search phrase. Sellers in the replica trade attach these words to Rotonde-style automatics. Cartier does not publish a Rotonde with the number 4061.
The Rotonde case
Rotonde de Cartier is a round case with a thin bezel, a fluted crown set with a blue sapphire cabochon, and a dial with Roman numerals. Case sizes run from 35 mm to 43 mm. The Rotonde de Cartier Automatic 40 mm uses caliber 1904-PS MC, a 27-jewel movement with a 48-hour power reserve. Genuine cases are 18k gold or steel, 8.9 mm to 11 mm thick.
The 4061 number
No public catalog ties 4061 to a Cartier case reference or a Cartier caliber. Cartier movement codes from this period run in the 1904 and 4300 series. Treat 4061 as a seller label. Ask for the caseback engraving, the caliber stamp under the balance, and the serial. A number that appears in a listing but not on the watch is a red flag.
What to check on an automatic
- Case thickness. Copies run thick, often 12 mm or more, because the movement is a stock ETA or Seagull clone.
- Sweep. A 28,800 vph movement sweeps at 8 beats per second. A 21,600 vph movement shows 6.
- Crown. Genuine cabochons are sapphire and sit flush. Copies use glass or dyed epoxy.
- Dial print. Roman numerals on a genuine Rotonde sit on a guilloche ground with sharp edges.
- Caseback. Engine-turned or sapphire, held by 4 to 8 screws.
Legal status in the US
Sale of a counterfeit watch is trademark counterfeiting under 18 U.S.C. section 2320. Penalties reach 10 years for a first offense. US Customs and Border Protection seizes counterfeit shipments at ports and destroys them. A buyer who resells carries the same exposure as the seller.
Unknowns
No public source confirms a Cartier reference 4061. Price data for replica Rotondes varies by factory and cannot be verified.