The Ref. 5512 from 1959 has just about anything we might try to look for on the current Submariner. Its scenario experienced developed to 40mm, up within the 37mm to 38mm of previously items. Crown-guards have been additional, and also the bezel now somewhat overhung the side of the case https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/