Launched in 1997, the Aquanaut is now considered a more casual alternative to the Nautilus. Interestingly, the very first iteration of the design, already sporting the 5065 reference number, was in fact a gold watch with alligator strap part of the Nautilus collection. This precious metal iteration was most likely a market test for a more elegant Nautilus variant (black flat dial, gold case, strap). In the end, most probably spurred by the market feedback, the company went the opposite way, offering with the Aquanaut an even sportier and younger line of watches than the Nautilus. The rubber strap - a choice that was extremely iconoclastic, especially for a brand as traditional as Patek Philippe - is a clear indication of this philosophy.

The present stainless steel 5065 is offered in absolutely unrestored condition, sporting a flawless dial and a case which has never seen the polishing wheel in its entire life.