Named after the fictional Captain Nemo’s famous submarine and featuring its unique octagonal bezel, the Nautilus retains its close affiliation with the maritime world to this day. When it was first released in 1976, the bulky stainless-steel bracelet and large 42mm case proved something of a departure from traditional expectations of a sports watch, but it would become one of Patek Philippe’s most popular timepieces in the collection. Originally designed for robust simplicity, Patek has started to add certain complications such as the moonphase and power reserve featured in this pre-owned 2014 reference 5712G.