ROLEX, COSMOGRAPH DAYTONA « APH », Oyster Perpetual, Cosmograph Daytona, Ref. 116520, movement no. CO508563, case no. V914305, sold in 2010 A rare and very attractive, mint and full-set, water-resistant, tonneau-shaped, stainless steel, automatic, certified chronometer, chronograph wristwatch with gloss black “APH” dial, luminous hands, 12-hour and 30-minute registers, tachymeter scale, screwed pushers and crown, stainless steel Oyster bracelet, Ref. 78590. Fitted with a caliber 4130, rhodium-plated, mechanical, self-winding, 44 jewels, straight line lever escapement, shock-absorbers, Breguet hairspring, screwed case back, pushers and crown, crown guards, sapphire crystal. Dial, case and movement signed. Diam. 40 mm. Thickness 12.30 mm. Approx. overall length for bracelet 195 mm. Accompanied by a fitted green presentation box with outer packaging, user manual, guarantee booklet, red chronometer seal, original hang tag, guarantee card dated June 2010. Introduced in March 2000 at the Basel Fair, the Daytona Ref. 116520, presented here, replaces Ref. 16520, born in 1988 and equipped with the Zenith El Primero caliber modified and renamed by Rolex, 4030. The new Daytona is now equipped with the Rolex first in house chronograph caliber, named 4130, with column-wheel, chronometer certification and Parachrom balance-spring. The present watch is an very rare variant within the 116520 family. This particular model is nicknamed the "APH Daytona" due to its dial configuration. Produced between approximately 2010 to 2014, this version displays a gap between the "R" and "APH" in "Cosmograph" on the dial.