3066. 3066Y (25644684/1) Vacheron & Constantin. An unusual and rare cushion form silver manual wind single button chronograph wristwatch with pulsations dial Vacheron & Constantin. Chronographe bracelet en argent (925) avec échelle de pulsations mouvement mécanique Date: Circa 1930 Movement: 19-jewel Cal.V434 manual wind, column wheel chronograph Dial: White enamel, black Arabic numeral hour markers, black outer 1/5th second divisions with Arabic numeral 5 minute markers, red outer pulsations scale, subsidiary dials at 3 and 9 for seconds and 30 minute recording, blued steel spade hands, centre chronograph hand Case: Polished cushion form, snap on back, No.115133 Strap/Bracelet: Associated brown crocodile leather Buckle/Clasp: Associated steel buckle Signed: Case, dial & movement Size: 30mm Weight: 41,03g