Patek Philippe Genève, Nautilus "Jumbo", Movement No. 1306867, Ref. 3700/1, Cal. 28-255C, 42 mm, circa 1979

A gentleman's heavy automatic Geneva wristwatch with date - with original box
Case: 18k gold, screwed on bezel, 18k gold bracelet with deployant clasp. Dial: black, structured, applied indexes, baton hands. Movm.: 18k gold rotorwind movement, rhodium-plated, "fausses côtes" decoration, 8 adj., 29 jewels, Geneva quality hallmark, Gyromax balance, shock protection.