American Shear Knife Company established 1933 in Homestead, PA.  This Handbook/Catalog is the Third Edition.  My best guess is this handbook was published in the 1970's or early 1980's.  I acquired it in the early 1980's.  It contains information on Shear Knives, Slitter Knives and Spacers, Scrap Knives, Wearing Plates, Liners, Pressure Blocks, Rocker Plates, Machine Ways, Processing Rolls, Galvanizing Rolls, Tinning Machine Rolls, Terne Coating Rolls, Shape Straightening Rolls, Leveling Rolls, Sendzimir Mill Rolls, Stretch Reducing Tube Mill Sizing Rolls and Stitcher Punches and Dies.