The Ref. 5512 from 1959 has almost everything we would try to look for on The existing Submariner. Its scenario experienced developed to 40mm, up from your 37mm to 38mm of before parts. Crown-guards had been included, as well as the bezel now marginally overhung the side of the case https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/