Precision Time Measures Charles T Higginbotham Vintage hardcover book detailing aspects of measuring precision time useful to time-piece makers. Includes chapters on the mainspring, watch jewels, balance staff, springing, magnetism, adjusting, workmanship, and others, with valuable pairing black-and-white schematic illustrations for context. 345 pages
North American Watch Tool & Supply Company
1952
North American Watch Tool & Supply Company
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