Case

At first glance, vintage Tudor Submariner cases appear nearly identical to their Rolex counterparts. This is hardly surprising, as Tudor sourced many of its external components directly from Rolex. Yet a closer examination reveals a number of subtle differences that help define the Tudor Submariner on its own terms.

Although Tudor and Rolex Submariners shared the same overall case dimensions throughout much of their production, they often wear differently on the wrist. A significant contributor to this difference is caseback design. Early Tudor references such as the 7928 and 7016 are generally found with flatter casebacks that sit closer to the wrist, resulting in a slimmer overall profile than comparable Rolex Submariners. While Tudor never publicly documented the reason for this design choice, it was likely influenced by the use of thinner ETA and Fleurier-based movements, which required less internal clearance than contemporary Rolex calibres.

Caseback design evolved further with the introduction of the 94-series references - which featured a noticeably taller caseback, increasing the overall thickness of the watch and giving these references a more substantial wrist presence. Interestingly, this change occurred despite Tudor's continued use of ETA movements, suggesting that factors beyond movement dimensions also influenced case construction during this period.

Crowns and casebacks represent another area where Tudor's relationship with Rolex is most visible. Throughout much of the Submariner's production, Tudor utilized Rolex-manufactured crowns, tubes, and casebacks bearing the familiar Rolex markings found on contemporary Rolex Submariners. Following the use of Brevet crowns on the earliest references, Tudor adopted Rolex's 700 Twinlock crown before later transitioning to the 702 Twinlock and eventually the 703 Triplock crown as water-resistance technology evolved. Likewise, many Tudor Submariner casebacks were manufactured by Rolex and carry the same internal Rolex signatures found on period Rolex references.

Taken together, these differences in caseback design and overall wearability help distinguish the Tudor Submariner from its Rolex counterparts. While the two brands shared a common foundation, Tudor gradually developed a character of its own - one defined by subtle variations that are increasingly appreciated by collectors today.

Additional details on the case, crown and caseback can be found in the REFERENCES section of the site.