Piaget Polo Perpetual Calendar Ultra-Thin watch Automatic Steel Perpetual Calendar Ultra-Thin Watch Product type: Watch Metal: Steel, Grey Strap material: Steel Strap color: Gray Strap buckle: Steel Strap buckle: Triple folding clasp Case shape: Round Case diameter: 42 mm Case thickness: 8.65 mm Dial color: Green Piaget Polo Perpetual Calendar Ultra-Thin watch, 42 mm. Steel case. Green dial with SuperLumiNova® indexes and hands. Watch delivered with an interchangeable green rubber strap. Sapphire crystal case back. Manufacture 1255P ultra-thin automatic mechanical Perpetual Calendar movement with hours, minutes and moon phases.