Automatic mainsprings for wristwatches

Automatic mainsprings for wristwatches provide a highly resilient, corrosion-resistant power source for modern automatic movements. The special material ensures constant torque delivery, high elasticity and a particularly long service life - even under intensive stress from the rotor winding mechanism.

The variants available from Boley are equipped with a riveted drag spring, which ensures smooth power flow in the automatic system and enables clean winding of the barrel.

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