Cylinder
The hollow arbor upon which the balance of a cylinder watch is mounted in such a way as to be free to vibrate thus allowing a tooth of the escape wheel to pass, and imparting motion to the balance.
How to true a balance, repair a chipped dial, temper a spring or test a stone — the working bench-book of the American watch trade, arranged A to Z.
The hollow arbor upon which the balance of a cylinder watch is mounted in such a way as to be free to vibrate thus allowing a tooth of the escape wheel to pass, and imparting motion to the balance.