It was also the 1st to have a sapphire crystal, the main being waterproof to 300m, and the last to have a matte dial. Actually, some really late operate ref. The ref. 16800 has a tendency to get ignored in Submariner fandom, however it is unquestionably an essential reference while https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/