Royal Oak Tourbillon Chronograph, Ref: 25977ST, Case No. F25538, Limited production, Circa 2000's
25-jewel, Cal. 2889 manual wind movement, rhodium plated, hand decorated, one minute tourbillon, monometallic balance, adjusted to heat, cold and 5 positions, column wheel, black dial with checker, applied luminous hour index in white gold, luminous white gold baton hour and minute hand, subsidiary dials for seconds and 30 minute chronograph register, tourbillon aperture at 6, polished and brushed steel case, 8 white gold screws holding the octagonal bezel, brushed crown and chronograph pusher with guards, sapphire crystal, display case back held by 8 screws, stainless steel bracelet with locking buckle, together with fitted original box and certificate, case, dial and movement signed 44mm.