A stainless steel mother-of-pearl 'Santos Demoiselle' quartz wristwatch, by Cartier

A stainless steel mother-of-pearl 'Santos Demoiselle' quartz wristwatch, by Cartier
The square mother-of-pearl dial with Roman numerals, blued steel hands and secret signature at 'X', within a polished bezel, to the brick-link bracelet with double deployant clasp, case 20mm wide, bracelet 17.5 cm long
Dial, case and buckle signed Cartier, case no. 621391 PB 2698