Cartier Rotonde Chronograph Black Dial Watch, 40 mm model, Cartier 7750 modified self-winding mechanical chronograph movement. Stainless steel case, bead-shaped stainless steel crown, head set with a cabochon synthetic spinel. Silver-plated dial with sunray effect, apple-shape steel hands, small dial sword-shaped blue steel hands. Cartier Rotonde Chronograph Black Dial Watch has Sapphire crystal mirror. Semi-matt black brown calfskin strap, stainless steel brushed original folding clasp. There is a calendar display window at 6 o’clock and a sapphire crystal transparent case back.