Rolex Cosmograph Daytona Blue Dial Ref. 116509

Rolex Cosmograph Daytona Blue Edition in 18kt White Gold with Monobloc Middle Case and Screw-Down Case Back with Winding Crown, Gorgeous Rare Blue Dial, Luminescent Index Hour Markers and Hands, 18kt White Gold Tachymeter Engraved Bezel, 18kt White Gold Oysterlock Bracelet.

The 40mm diameter Oyster solid three-body case, bracelet, and flat bezel with a tachymeter graduation to 400 UPH, are polished/brushed. The dial is blue with luminous applied white gold "boat-shaped" and square hour markers, luminous white gold baton hands, a white gold center sweep chronograph second hand with an arrow tip and a small ovoid counterbalance, and there is a black perimeter minute/seconds scale with 8 white luminous pips at 6 o'clock. It has three recessed subsidiary dials with white Arabic numerals, markers, and white gold indicator hands, including a constant running small seconds register at 6 o'clock, a 12-hour chronograph register at 9 o'clock, and there is a 30-minute chronograph counter at 3 o'clock. It's water resistant to 100 meters/330 feet, it has a 72-hour power reserve at full winding, and the 12mm thick case, dial, and movement are all signed.

This Rolex Cosmograph Daytona Blue Edition has a mechanical automatic self-winding Rolex caliber 4130 column wheel chronograph movement. It's rhodium-plated, and it's constructed with 44 jewels, a shock absorber mechanism, a straight-line lever escapement, and a monometallic balance that's adjusted to temperatures and 5 positions. It includes a self-compensating free-sprung Breguet balance spring, a hacking seconds device, Microstella regulating screws, a blue Parachrom hairspring and overcoil, and the mechanism oscillates at a frequency of 28,800 vph (4Hz).

Reference No. 116509