Piaget Polo Perpetual Calendar Ultra-Thin watch, 42 mm. Case in rhodium finish 18K white gold case set with 56 brilliant-cut sapphires (approx. 1.88 cts). Blue obsidian dial. Watch delivered with an interchangeable rubber strap. Sapphire crystal case back. Manufacture 1255P ultra-thin automatic mechanical Perpetual Calendar movement with hours, minutes and moon phases.