The Cartier Santos, first designed in 1904, and debuted as one of the first modern watches for men, designed specifically to be worn on the wrist. Today, the Santos remains one of the most beloved models produced by Cartier. This particular Santos De Cartier model ref: WSSA0013 is the large 39.8mm with self-winding mechanical movement, steel case, seven-sided crown set, faceted synthetic spinel, silvered opaline dial with blued-steel sword-shaped hands. This model comes with two interchangeable bracelets, one full steel and the second blue coloured calfskin with steel buckle.