LUCIEN PICCARD. A GOLD FILLED AUTOMATIC CALENDAR WRISTWATCH WITH WORLD TIME GTO Seashark 600, c.1970sLUCIEN PICCARD. A GOLD FILLED AUTOMATIC CALENDAR WRISTWATCH WITH WORLD TIMEModel: GTO Seashark 600Date: c.1970sMovement: 17-jewel automatic Dial: Grey, applied luminous filled gilt hour markers, date aperture at 3, gilt luminous filled hour hand, orange luminous filled minute hand, centre secondsCase: Tonneau form, bi-rotating bezel with international cities, No.41730Strap/Bracelet: Brown leatherBuckle/Clasp: BuckleSigned: Case, dial, and movementSize: 37mmNone