Kalle Slaap from Chronoglide in the Netherlands demonstrates how to identify vintage watch movements and source replacement parts when brand marks or hallmarks are missing. He explains how to use specialized reference catalogs like “Best Fit” to match a caliber by the distinct shapes of its setting lever and yoke components. The tutorial emphasizes the necessity of precise measurements, such as movement diameter in lignes and balance staff dimensions, using tools ranging from professional micrometers to affordable alternatives. By tracing a mystery Zenith-branded timepiece to its original Movado caliber, Kalle shows how this investigative approach enables watchmakers to successfully procure the correct parts for complex restorations.
