Say you walk into a watch shop in 1967 dead set on buying a Rolex. The one you fancy is the dive watch, the one that’s casual with the black bezel, simple black dial with no date, and that steel bracelet. Leather straps are so ’50s. You spot the watch, it’s called the Submariner, and you ask how much it costs. “$225,” you hear from the salesperson – no small sum but also not bank account shattering. So you pull the trigger. You don’t necessarily know it on this day, but you’ve just emerged from the store with a ref. 5513, two-line Submariner – a watch that will not only outlive you, but will also serve to be as much a wrist companion as it is a legitimate appreciating investment piece.