The Patek Philippe Nautilus has become one of the most iconic and important watches in history. Introduced in 1976, the reference 3700 was the first example ever made. Initially, the Nautilus was only intended to be made in steel but a few years after introduction, Patek Philippe began making yellow gold 3700s. This example is an extremely rare variation, the reference 3700/13J with factory set diamonds in the bezel.