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.

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Independent Seconds & Inertia

Independent Seconds

A movement having a seconds hand that is driven by a separate train.

Inertia

That property of matter by which it tends when in rest to remain so, or when set in motion to continue so.

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