AUDEMARS PIGUET ROYAL OAK AUTOMATIC YELLOW GOLD Audemars Piguet, "Royal Oak, Automatic," movement No. 205332, case No. 791, Ref. BA 4100/477. Sold on October 12th, 1979. Fine and rare, octagonal, self-winding, water-resistant, 18K yellow gold wristwatch with date and an 18K yellow gold Audemars Piguet link bracelet with concealed deployant clasp. Accompanied by an Audemars Piguet fitted box, Certificate of Origin and booklets. Two-body, polished and brushed, octagonal bezel set with 8 hexagonal nuts embanked in 8 screws on the case back, angled lugs with 4 screws to fix the bracelet, sapphire crystal. Gray "clous de Paris" with applied luminous yellow gold baton indexes, aperture for the date. Luminous yellow gold baton hands. Rhodium-plated, fausses cotes decoration, 36 jewels, straight-line lever escapement, Gyromax balance adjusted for heat, cold isochronism and 5 positions, shock absorber, self-compensating flat balance spring, 21K gold rotor. Notes Dial, case and movement signed. DIM. 35 x 44 mm. THICKNESS 7.5 mm. Approx. overall length 180 mm.