The Ref. 5512 from 1959 has almost almost everything we might try to find on The present Submariner. Its circumstance had grown to 40mm, up from your 37mm to 38mm of earlier items. Crown-guards were being extra, plus the bezel now a little bit overhung the facet of the situation https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/