Case material: Yellow gold; Charge: Automatic; Conditions: Used Presentation condition : Without documents; Model: Type XX / Type XXI Price on request Gmtbroker Reference: 3800 Pristine preowned Patek Philippe for Gubelin mens first generation Nautilus. Rare double signed dial. Solid 18k yellow gold on bracelet. Automatic movement. Comes with its box and Archival document as shown. Total weight: 142.3 grms / 91.5 dwt