The Watch Adjuster's Manual, Fourth Edition Charles Edgar Fritts Vintage hardcover book detailing specifications for watch repair; organized into sections on balancing, springing and timing, isochronism, and several more. Includes useful repair commentary and 56 original illustrations, as well as revisions and updates for this 4th edition publishing. 363 pages
The Keystone Publishing Co.
1912
Charles Edgar Fritts
Reference, Repair