Audemars Piguet Royal Oak Tourbillon Chronograph Black Dial Steel Mens Watch, Ref. 25977STOO1205ST02

Black grande tapisserie dial with luminous hands and index markers; Minute track around outer rim; Analog display; Skeleton transparent exhibition case back; Silver-tone stainless steel case shape octagon measuring 44x58mm thick at 12.9mm; Fixed silver-tone bezel; Luminous appliques or indices (confirm exact marker type); Date function via sub-dial or aperture; Luminescent hour markers and hands ensuring night readability; Two central chronograph counters for 60 seconds and 30 minutes with proper sweep second hand; Small seconds sub-dial; Column wheel mechanism visible through sapphire crystal; Hour, minute, small seconds display (verify exact configuration); Audemars Piguet Calibre 2889 automatic mechanical movement, self-winding via rotor; Hand wind capability as secondary function; 28 jewel setting in the movement; 70 part count for complexity; Biting rate of approximately 21600 vph; Power reserve of around 72 hours from full winding; Pull/push crown operation with screw-down function (specify if fixed/screwed); Scratch-resistant sapphire crystal front and exhibition back; Deployment clasp closure system on the bracelet; Silver-tone finish applied to stainless steel components including case, lugs, bracelet links, bezel; Swiss Made label indicating origin and quality; Water resistance up to 20 meters / 65 feet suitable for casual splashes.