The Ref. 5512 from 1959 has just about almost everything we might try to find on the current Submariner. Its circumstance had developed to 40mm, up in the 37mm to 38mm of previously items. Crown-guards were included, as well as bezel now a little overhung the facet of the case https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/