Men's Swiss made luxury watch, Royal Oak series from Audemars Piguet. Ref. 26240or.oo.1320or.01 special edition celebrating the 50th anniversary. Rose gold-tone case crafted from 18kt rose gold with octagon shape and screw-down case back (model features transparent see through case back). Fixed bezel also made of 18kt rose gold in matching tone. Blue dial features luminous markers for hour, minute, and second functions along with rose gold-tone hands pointing to the indices (hour markers are indexes), additionally displaying minute markers around the outer rim at both analog dials - one main blue dial and a bezel view if applicable but description focuses on main dial index markers and minute markers. Main dial shows luminous coated elements for hour, minute, second and date display located between 4-5 o'clock position. Analog dial type includes central hours, minutes, seconds and day/date subdials for chronograph function (three sub-dials displaying: 12-hour, 30-minute, and 60-second). Calibre AP 4401 automatic mechanical movement with approximately 70 hours power reserve beating at a frequency of 28800 vph. Movement contains 40 jewels including the ruby bearing components and is composed of over 367 parts using an automatic winding system (rotating mainspring) likely featuring a column wheel for chronograph control and a centrally mounted rotor. Includes flyback complication allowing resetting and starting chronograph functions with one press. Rose gold-tone applied index hour markers on main blue dial, minute markers around outer rim at both analog dials - one main dial and potentially the bezel view if mentioned but description focuses primarily on main dial features including indices for hours, minutes, seconds and luminous coating throughout hands and markers. Luminous material used on hands and markers (typically Super-LumiNova) ensuring legibility in low light conditions. Date function visible at 4-5 o'clock position. Sapphire crystal providing scratch resistance protection over the dial view. Screw-down crown for secure sealing against water ingress, depth up to approximately 165 feet / 50 meters. Deployment clasp with push button release mechanism used on the bracelet attachment. Functions include chronograph (with three sub-dials), date display, analog hour/minute/second readouts, column wheel operation, flyback capability. Complete set includes original presentation box and instruction manual along with an international warranty card.
![Pre-owned Audemars Piguet Royal Oak Tourbillon Chronograph Blue Dial Mens Watch [25977ST-OO-1205ST-01]](https://cdn.lepodium.net/images/000/088/88074-2.jpg)
