Tudor Submariner 7928 Pointed Crown Guard Case Gilt Chapter Ring DialSome watches quietly define a brands storyand the Tudor Submariner Reference 7928 is undoubtedly one of them. Introduced at the end of the 1950s, this reference marked an important step forward for Tudor. It was the first Submariner to feature crown guards, a subtle yet meaningful evolution inspired by the needs of professional divers, including those of the French Navy. A small detail perhaps, but one that speaks volumes about purpose and progress.