The Ref. 5512 from 1959 has nearly everything we might try to look for on the current Submariner. Its situation had grown to 40mm, up in the 37mm to 38mm of previously parts. Crown-guards were being added, along with the bezel now slightly overhung the aspect of the case to https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/