Abbott's American Watchmaker and Jeweler

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.

U

2 entries in this part of American Watchmaker and Jeweler.

Universal Head

The universal head, shown in Fig. 308, has entirely superseded the clumsy universal mandrel in this country. It is more accurate, less…

Unlocking Resistance

The resistance opposed to unlocking by the adhesion between the locking faces of the pallets and the tips or the escape wheel teeth, and in…

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