(55981) Blancpain Aqualung Big Date 2850B-3630A-64B, 2850B3630A64B, brushed 18k rose gold on a strap with an 18k rose gold double fold deployant buckle, automatic caliber 6950 movement, big date at 6 o'clock, centered sweep seconds hand, display back, sapphire crystal, water resistant to 330 feet. Diameter: 40mm, Thickness: 12mm. Like New with Blancpain box, papers dated 2009, and service papers from 2022.