The Ref. 5512 from 1959 has almost every little thing we would try to find on the current Submariner. Its case had developed to 40mm, up in the 37mm to 38mm of previously pieces. Crown-guards ended up extra, along with the bezel now somewhat overhung the aspect of the situation https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/