Winter poses a variety of concerns towards the watch wearer — useful, sartorial and at times specialized questions. Commencing production at the same time because the ref. 6200, the Submariner ref. 6536 returned to some thinner situation and lesser crown (and 100m h2o resistance) but was presented the Cal. 1030, https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/