Practical Modern Watchmaking. A Series of Educational Bulletins by The Horological Institute of America for distribution to Members of the Institute. Part II - Manipulation of Watch Hair Springs.

Washington, D.C. Horological Institute of America, c/o National Bureau of Standards, May, 1942. Softbound. Quarto, stapled paper covers, 24 pp., b/w drawings and photos. Very Good. Item #88314

Price: $25.00

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