Poising Tool
A tool consisting of two parallel jaws mounted upon a base in such a way that they may be opened or closed to suit the length of the arbor of the piece to be poised. When using the tool it must be perfectly level.
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 tool consisting of two parallel jaws mounted upon a base in such a way that they may be opened or closed to suit the length of the arbor of the piece to be poised. When using the tool it must be perfectly level.