Swiss Material System 1948 Edition John A Poltock and Co. Softcover book identifying Quick Fit Swiss Material System watch movements and parts. Includes reference charts with black-and-white illustrations and detailing part numbers, diameters, top and post sizes, and other valuable information. 64 pages
Hammel, Riglander, & Co., Inc.
Hammel, Riglander, & Co., Inc.Reference, Repair