Visual Description
The Ref. 8057915 is the small Panthère in 18k yellow gold, 21 to 22 mm wide, set with diamonds. Antiquorum and Fellows catalog a diamond-set bezel, Monaco Legend a bezel of 36 diamonds with more stones on the outer bezel and lugs, and Sotheby's examples with a diamond-set crown, a pavé diamond dial or a diamond-set bracelet. Sotheby's describes one silvered dial with painted Roman numerals, the secret signature at X and a date at 3 o'clock; Monaco Legend catalogs a blue dial with applied gold Roman numerals. The case runs into a gold Cartier bracelet with a double folding clasp.
Reference Significance
The 8057915 is a diamond-set number for the small gold Panthère. The same size in 18k yellow gold also appears as the Ref. 8669, the Ref. 107000, the Ref. 1070 and the Ref. 1280; every 8057915 found is diamond-set, and no source found explains how the numbers relate. Sotheby's also catalogs the 1999 Panthère Classic et Figaro limited edition under this number.
Historical Context
Antiquorum dates an example to about 1980 and Monaco Legend one to the 1980s. Sotheby's dates others to about 1995, 1999 and 2000. Sotheby's and Fellows both catalog the Cartier Cal. 157 quartz movement, and Sotheby's gives it 4 jewels. No source found gives a first or last year for the number.
What to Look For
Read the case back for 8057915 and a serial, such as 8057915/00143. Count and inspect the diamonds on the bezel, lugs, crown and bracelet, since stones can be lost or replaced. Fellows' condition report calls the champagne dial with diamond dots on one example a third-party dial, so compare the dial with the documented ones. Check that the bracelet has all its links, that the clasp closes firmly and that the quartz movement runs.

