3102. 3102Y Eberhard. An 18K gold manual wind calendar chronograph wristwatch with roulette date wheelModel: Contodat Date: Circa 1960 Movement: 21-jewel Cal.310-82 manual wind, column wheel chronograph Dial: Silvered, applied gilt baton hour markers, black outer 1/5th second divisions, blue outer scale, red line for 50kph, subsidiary dials at 3 and 9 for seconds and 30 minute recording, date aperture at 6, gilt pointed baton hands, centre chronograph hand Case: Polished round, snap on back, crown flanked by twin chronograph buttons, No.31502 743 Strap/Bracelet: Associated black leather Buckle/Clasp: Associated gilt buckle Signed: Case, dial & movement Size: 38mm Weight: 55,44g