Capped Jewel
A jewel having an end stone as shown in Fig. 48. In all movements, except the cheapest grades, capped jewels are used for the balance pivots.
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.
A jewel having an end stone as shown in Fig. 48. In all movements, except the cheapest grades, capped jewels are used for the balance pivots.