Certina 616/1 and 620 Escape Wheel Jewel Parts List
Escape wheel jewel specifications and parts identification for Certina calibers 616/1 and 620 watch movements. This technical parts list details both lower and upper escape wheel jewels across a comprehensive range of compatible caliber derivatives—including base calibers 230, 240, 300, 19-10, 260, 320, 12-10, 13-50, 15-21, 17-351, and 23-20. Essential reference material for watchmakers performing escapement service, repair, or component replacement on these movements.
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Document Details
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- Watchmaking