Ask most people about Patek Philippe's sports catalog and they will likely go straight to the Nautilus. Press them on the Aquanaut and you will hear it called the affordable entry point, the younger sibling, the rubber-strap alternative. None of that is wrong, exactly, but none of it is useful, not if you are trying to decide which reference to buy, what you should pay for it pre-owned, and whether the premium commanded by certain variants reflects genuine desirability or just market inertia. Today we are taking a closer look at the collection to help you decide the best piece for you.