The Patek Philippe Nautilus is without question one of the great horological icons of the 1970s, and one of the most in-demand timepiece models on the planet.

Collectors and prospectors alike are clamoring to get their hands on Genta's second great luxury sports watch, and with the discontinuation of the flagship reference 5711 in steel, this dramatic rise in popularity shows no signs of slowing down.

This Nautilus, a Reference 3900/1A, embodies all of the porthole-inspired character of its larger siblings. Dating to the 1980s, it is presented in an elegant 32mm stainless steel case with matching integrated bracelet, Patek's Calibre E23 S C quartz movement, and a stunning blue gradient teak-pattern 'Sigma' dial with beautifully patinated, luminous indices and matching handset.

A Patek Philippe Nautilus — in any of its variations — is a very special thing. But we'd be lying if we said we didn't have a real affinity for the often overlooked midsize models such as this one!