18kt yellow gold case with a yellow gold-tone 18kt yellow gold bracelet. 8 screws fixed 18kt yellow gold bezel. Slate grey skeleton dial with gold-tone hands and index hour markers. Minute markers around the outer rim. Dial Type: Analog. Luminescent hands and markers. Audemars Piguet Calibre 2924 Hand Wind movement, containing 25 Jewels, composed of 216 parts, and has a power reserve of approximately 70 hours. Scratch resistant sapphire crystal. Skeleton transparent exhibition see through case back. Octagon case shape, case size: 41 mm, case thickness: 8.95 mm. Deployment with push button release clasp. Water resistant at 200 meters / 660 feet. Functions: tourbillon, hour, minute, power reserve indicator. Luxury watch style. Watch label: Swiss Made. Audemars Piguet Royal Oak Tourbillon Extra- Thin Slate Grey Skeleton Dial 18 Carat Yellow Gold Men's Watch 26513BA.OO.1220BA.01.