MILNES Lathes, Planers & Accessories Catalogue 1922 showing the Types R, G, B, X, Y, W, Z, I, N, D and K (ornamental turning) 41 pages.

Rockwell Hardness Testers by the original US Wilson Company (then Acco Industries). Not a manual but a detailed explanatory Booklet from the 1980s describing how to determine which type of tester to choose for different jobs and materials with copious notes on the different types and methods to be used.