Tissot case backs typically feature a range of informative markings that vary by era and model. Common markings include the Tissot name and logo, serial number, case reference, caliber number, water resistance rating, case material, and country of origin (typically 'SWISS MADE' or 'SWISS'). The Tissot logo has evolved over the brand's long history, and the specific version can sometimes help approximate the production era.
Vintage Tissot case backs may include additional markings such as patent numbers, hallmarks, and metal quality stamps that were common during specific periods. For precious metal cases, hallmarks indicating the metal purity and the assay office can sometimes provide specific dating information based on the hallmark system used. The style of engraving, whether machine-stamped or individually engraved, can also vary by era and model tier.
Modern Tissot case backs tend to be more standardized, with clearly formatted reference numbers and contemporary markings. Many current models feature sapphire crystal exhibition case backs that allow the movement to be viewed, which is both a design feature and can help with authentication by allowing visual inspection of the movement. As with all watches, case back markings should be considered alongside other identifying features for a comprehensive assessment.