The Ref. 5512 from 1959 has almost every little thing we would search for on the current Submariner. Its case had grown to 40mm, up with the 37mm to 38mm of previously items. Crown-guards ended up added, as well as the bezel now marginally overhung the aspect of the situation https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/