Playtner, H. R. [from old catalog] · Chicago, Hazlitt & Walker · leaf 7
THOMAS MUDGE The first Horologist who successfully applied the Detached Lever Escapement to Watches. Bom 1715—Died 1791 AN ANALYSIS OF THE LEVER ESCAPEMENT BY H. R. PLAYTNER.I I A LECTURE DELIVERED BEFORE THE CANADIAN WATCHMAKERSAND RETAIL JEWELERS ASSOCIATION. ILLUSTRATED. CHICAGO: Hazlitt &…
Clocks and watches
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