Certina Cal. 17-221 Movement Parts List

Certina Cal. 17-221 automatic watch movement parts list and technical reference manual. This documentation covers five movement variants, each fitted with 32 rubies and operating at 21,600 alternations per hour. Variants include the Ancora design with date window, the Pallet-fork configuration with date aperture, the Anker caliber, and Ancora models offering calendar and side date window options. The manual references base calibers 15-20 and 15-21 as parent movements. Detailed exploded views on page 2 show complete movement assemblies with corresponding part numbers, allowing technicians to identify and source escape wheels, balance assemblies, mainplate components, gear trains, and all supplementary parts needed for service, repair, or restoration of this caliber family.