watch and pocket
Nivaflex Zugfedern für Armbanduhren und Taschenuhren
Nivaflex mainsprings from Boley are of unbreakable material, antimagnetic, self-lubricating, non-oxidising and do not fatigue.
Nivaflex mainsprings from Boley are of unbreakable material, antimagnetic, self-lubricating, non-oxidising and do not fatigue.