The Patek Philippe Nautilus was first introduced in 1978 at a time when watch cases were getting thinner, the Nautilus flew against this trend and soon became one of the brand's most iconic watch models. This exquisite watch case is made of 18 karat rose gold measuring 40 mm from the 10 to 4 o'clock positions, it houses the Caliber CH 28-520 C self winding automatic movement with 55 hour power reserve. The gradated dial is black featuring raised gold applied luminescent markers, a chronograph sub-dial at 6 o'clock and a date display in the 3 o'clock position. The strap is genuine alligator leather, it attaches to the wrist with an 18 kt. rose gold double fold over deployment clasp.