On the other hand, certainly Rolex's best triumph arrived alongside in 1953 when it formulated the very first Submariner. Like the ref. 6536 higher than, it absolutely was accessible in possibly chronometer and non-chronometer variants, but this was the first time the COSC watches essentially had the 'Formally Licensed Chronometer' https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/