So far, the Aquanaut has been available in the classic 40mm three hand plus date model, the travel time model, and the very cool white gold 42mm released for the model’s 20th anniversary last year in 2017. The chronograph is a natural next step, and there are a lot of people out there who want the brand image of a Patek but in a piece with a contemporary size and sporty design to feel natural on the wrist. This is definitely that piece, in my opinion.