The Ref. 5512 from 1959 has pretty much every thing we might try to find on The present Submariner. Its case experienced grown to 40mm, up with the 37mm to 38mm of before items. Crown-guards were being included, plus the bezel now a little overhung the side of the situation https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/