The Ref. 5512 from 1959 has just about all the things we would look for on The existing Submariner. Its circumstance had developed to 40mm, up from your 37mm to 38mm of before parts. Crown-guards have been additional, and the bezel now a little overhung the aspect of the situation https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/