The Ref. 5512 from 1959 has just about all the things we might try to find on The existing Submariner. Its circumstance had developed to 40mm, up through the 37mm to 38mm of previously parts. Crown-guards had been included, along with the bezel now a little bit overhung the side https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/