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Rules and practice for adjusting watches (1920)

Kleinlein, Walter John, 1876- [from old catalog] · [Boston, Hooper printing co.] · leaf 62

An illustration from Rules and practice for adjusting watches, 1920, leaf 62
Fig. 13 The Adjustment to Isochronism and Positions

Clocks and watches

Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.

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