Audemars Piguet Royal Oak Quantieme Perpetual Calendar in 18k. Auto w/ perpetual calendar. Ref C19584. Circa 2000s. Fine Pre-owned Audemars Piguet Watch. Certified preowned Dress Audemars Piguet Royal Oak C19584 watch is made out of yellow gold on a Gold Link band with a 18k Deploy buckle. This Audemars Piguet watch has a 38.5 x 38.5 mm case with a White Stick dial. Circa: 2000s . 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.