The Ref. 5512 from 1959 has pretty much anything we might seek out on the current Submariner. Its situation experienced developed to 40mm, up in the 37mm to 38mm of earlier items. Crown-guards were being added, along with the bezel now a little bit overhung the facet of the situation https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/