Piaget Gouverneur Calendar in 18k gold on an original Piaget black crocodile leather strap and 18k Piaget tang buckle. With white enamel dial with silver subsidiary dials: month, day, date & phases of the moon, Automatic. Ref 15958. Circa 1980s. Fine Pre-owned Piaget Watch. Certified preowned Dress Piaget Gouverneur 15958 watch is made out of yellow gold on a Black Leather Strap band with a 18k tang buckle. This Piaget watch has a 33 x 33 mm case with a Round caseback and White Calendar dial. Circa: 1980s . 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.