The Ref. 5512 from 1959 has just about every little thing we might seek out on the current Submariner. Its situation experienced developed to 40mm, up from the 37mm to 38mm of earlier items. Crown-guards ended up added, plus the bezel now a bit overhung the aspect of the case https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/