Even so, definitely Rolex's finest triumph came alongside in 1953 when it formulated the 1st Submariner. Such as the ref. 6536 above, it had been offered in either chronometer and non-chronometer variants, but this was the first time the COSC watches in fact had the 'Formally Licensed Chronometer' text on https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/