Audemars Piguet Classic in 18k on leather strap with authentic Audemars Piguet 18k tang buckle. Manual. 32 mm case size. Ref B 16781. Fine Pre-owned Audemars Piguet Watch. Certified preowned Classic Audemars Piguet Classic B 16781 watch is made out of yellow gold on a Black Leather Strap band with a 18k tang buckle. This Audemars Piguet watch has a 32 x 30 mm case with a Gold Stick dial. Circa: 1970s . It is Gray and Sons Certified Authentic and comes backed by our 12-month warranty. Each watch is inspected by our certified in-house Swiss-trained watchmakers before shipment including final servicing, cleaning, and polishing. If you have inquiries about this Audemars Piguet Classic watch please call us toll free at 800-705-1112 and be sure to reference W522264. Watch is in Excellent condition.