Tudor case backs have featured a variety of designs and markings throughout the brand's history. One of the most recognizable elements is the Tudor logo, which has undergone several evolutions. Early Tudor watches displayed a rose emblem, which was gradually replaced by the now-iconic shield logo during the 1960s and 1970s. The specific style of the shield or rose on the case back can often help approximate the production era. Many vintage Tudor case backs also display the reference number, material designation, and water resistance rating.
Historically, Tudor case backs were often manufactured by Rolex, and some vintage models may carry Rolex-related markings or coronet stamps alongside Tudor branding. The presence of both Tudor and Rolex markings on vintage pieces is generally considered consistent with the brand's manufacturing history. Dive models such as the Tudor Submariner often feature additional engravings related to water resistance and may include the Tudor shield prominently.
Modern Tudor case backs typically display the Tudor shield logo, reference number, material markings, and water resistance ratings. Current models in the Black Bay line feature solid case backs with clean, well-defined engravings. Tudor does not generally use exhibition case backs, even on models with in-house MT5xxx movements, which distinguishes the brand from many competitors at a similar price point.