3066. 3066Y National Park. An 18K gold single pusher manual wind chronograph wristwatch National Park. Chronographe mono-poussoir en or jaune 18K (750) mouvement mécanique Date: Circa 1930 Movement: 17-jewel manual wind Dial: Silvered, black Arabic numeral hour markers, black outer 1/5th second divisions, black outer pulsation scale, subsidiary dial at 3 and 9 for running seconds and 30 minute recording, blued steel leaf hands, centre chronograph hand Case: Brushed and polished round, hinged back, articulated lugs, chronograph button to band at 1, No.10071 Strap/Bracelet: Black crocodile leather Buckle/Clasp: Gilt buckle Signed: Dial Size: 35mm Weight: 43,62g