Vtg 1949 Di-Acro Catalog Die-Less Duplicating Coin-Op Aviation Machinist Medical
Original 40-page 1949 Di-Acro “Die-Less Duplicating” machinery catalog (No. 49-15) by O’Neil-Irwin Mfg. Co. The text outlines how die-less duplicating enabled the economical, high-precision production of finely adjusted scale components.
