Authenticating a Tissot watch typically involves examining the case back markings for correct formatting and consistency with known Tissot conventions. The serial number, case reference, and caliber number should all correspond to legitimate Tissot products and be consistent with each other. Cross-referencing these numbers with known databases and collector resources can help verify the watch's identity.
Movement inspection is commonly regarded as one of the most reliable authentication methods. Vintage Tissot movements should display appropriate finishing and construction for the era, often with Tissot branding on the movement itself. Modern Tissot watches use ETA movements that should be consistent with the caliber number on the case back. Qualified watchmakers can typically assess whether a movement is genuine and properly matched to the case.
Dial quality and printing are additional authentication factors. Genuine Tissot dials typically feature clean, precise printing with correct spelling and formatting. The Tissot logo, the 'T' touch-screen dot (on T-Touch models), and the '+' symbol (which Tissot uses as part of their branding) should all be properly rendered. As Tissot occupies a mid-range price point in the Swiss watch market, counterfeiting does occur, and collectors are commonly advised to purchase from authorized dealers or to seek professional authentication for secondary market purchases.