Certina 1641, 1642, 1643 Oscillating Weight and Reduction Gear Parts Reference
Technical parts reference for Certina automatic watch movements 1641, 1642, and 1643. Models 1641 and 1642 specify jewels for the upper and lower oscillating weight assembly, essential components for automatic weight regulation. Model 1643 covers jewels for the reduction gear train assembly. Supports calibers 19-45, 25-45, and 25-65 for models 1641 and 1642. Model 1643 additionally supports calibers 15-20 and 17-351. Cross-references all associated movement calibers: 19-451, 19-55, 19-551, 25-451, 28-45, 28-451, 25-651, 25-652, 25-681, 25-682, 17-21, 17-211, and 17-221. Ideal for watchmakers and technicians performing service work, overhauls, or component replacement on these movements.
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