The Ref. 5512 from 1959 has pretty much every little thing we would seek out on The present Submariner. Its situation experienced grown to 40mm, up in the 37mm to 38mm of before parts. Crown-guards were additional, and also the bezel now a bit overhung the side of the case https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/