Ollie Baker Chuck 2.25/2.50 mm attaches to the barrel arbor of the Ollie Baker style mainspring winder. Ollie Baker let-down chucks are used to wind and unwind clock mainsprings.
Ollie Baker Chuck 2.25/2.50 mm attaches to the barrel arbor of the Ollie Baker style mainspring winder. Ollie Baker let-down chucks are used to wind and unwind clock mainsprings.