SSIH Programmed Course on Mechanical Watch Spring-Balance Resonator Omega Watch Co Vintage softcover manual-style book detailing a course on mechanical watches and the spring-balance resonator, produced by the Omega Watch Company. Includes sections on working with movements and calibers, the resonator, the lever and escapement wheel, and many more, with useful pairing schematic illustrations for context. 63 pages
Omega Watch Co.
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