Ollie Baker Chuck #7-8 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 #7-8 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.