Identifying a Certina watch typically starts with examining the case back for the model reference, serial number, and caliber designation. The presence of the turtle DS logo on models claiming DS certification should be verified, as it is a key brand identifier. The reference number can be checked against Certina's catalog to confirm that the model exists and that the markings are consistent.
Movement inspection provides another layer of authentication. The movement should match the caliber indicated on the case back, and its construction and finishing should be consistent with Certina's known standards for that era. Modern Certina watches use ETA movements that are well-documented and recognizable to experienced watchmakers. Vintage Certina movements should display appropriate branding and finishing for the era.
Dial quality and consistency are additional factors in identification. Genuine Certina dials should feature clean printing with the correct logo version for the era. The DS designation, when present, should be correctly rendered. As Certina is a mid-range Swiss brand, counterfeiting is less prevalent than with more expensive luxury brands, but it does occur. Purchasing from authorized retailers and seeking professional authentication for secondary market purchases are commonly recommended practices.