The Ref. 5512 from 1959 has just about almost everything we'd try to look for on The existing Submariner. Its scenario experienced developed to 40mm, up through the 37mm to 38mm of previously parts. Crown-guards were extra, and also the bezel now a bit overhung the aspect of the situation https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/