Certina Caliber 621 Lower Pallet Staff Jewel - Parts List Reference
Certina caliber 621 lower pallet staff jewel parts reference table. This technical data sheet identifies the pallet staff jewel part number 621 and provides a comprehensive cross-reference table matching this component to applicable Certina movement calibers including series 230, 260, 320, 410 and individual calibers 12-10, 13-50, 15-20, 15-21, 17-351, 23-20, 23-30, and 28-10. Essential reference documentation for watchmakers identifying correct replacement jewel components across multiple Certina movement families.
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