The Ref. 5512 from 1959 has almost almost everything we might try to find on The present Submariner. Its case experienced grown to 40mm, up from the 37mm to 38mm of before parts. Crown-guards ended up additional, plus the bezel now a little bit overhung the facet of the case https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/