The Ref. 5512 from 1959 has pretty much everything we would hunt for on The present Submariner. Its case experienced developed to 40mm, up through the 37mm to 38mm of earlier parts. Crown-guards ended up included, as well as the bezel now a little overhung the facet of the case https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/