The Ref. 5512 from 1959 has almost everything we'd seek out on The present Submariner. Its scenario had developed to 40mm, up from the 37mm to 38mm of previously pieces. Crown-guards have been extra, as well as bezel now somewhat overhung the side of the case to make it easier https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/