Visual Description
The Ref. 1310 is the medium steel Panthère, about 27 mm wide, with dealers giving lengths of 32 and 36 mm. The case, its bezel fixed with screws, runs into an integrated brick-link steel bracelet that closes with a signed concealed clasp. The white or cream dial carries black Roman numerals inside a railroad inner track, with a date aperture at 5 o'clock, read by blued steel hands and a center seconds hand. The crown is set with a blue cabochon.
Reference Significance
The 1310 is the medium size of the steel Panthère, below the 29 × 40 mm Jumbo Ref. 1300, with which it shares the steel case, date window, center seconds and integrated bracelet. WannaBuyAWatch describes it as the man's size, as distinct from the man's XL, and notes that it is now called the midsize model.
Historical Context
Cartier introduced the Panthère in 1983. The 1310 is documented from the 1990s: Lyon & Turnbull sold one bought new in 2000, with box and papers, and Bachmann & Scher dates another to about 2001. One dealer's listing dates its example to the 1980s in its title and to the 1990s in its description, so an earlier start is possible but not documented.
What to Look For
Read the case back for the model number and serial. The bracelet should have its links and a signed concealed clasp that closes without play. The dial should show crisp black Roman numerals, the date at 5 o'clock and a center seconds hand, the hands should be blued steel, and the crown should keep its blue cabochon. Dealers list both sapphire and mineral glass crystals on 1310s.

