THIS IS A HARD-TO-FIND 1950'S VINTAGE BERGSTROM FREE FLOWING SURFACING WELDING ELECTRODES - APPLICATION AND TECHNICAL DATA MANUAL. PUBLISHED CIRCA THE 1950'S BY INDUSTRIAL OVERLAY METALS INC. OF EATON OHIO THIS 90+ PAGE SOFTCOVER MANUAL / BOOK MEASURES 8 5/8" BY 11" AND IT IS FILLED WITH ILLUSTRATIONS AND TECHNICAL DATA COVERING THE USES AND APPLICATIONS  OF BERGSTROM FREE-FLOWING SURFACING WELDING ELECTRODES FOR ALL FERROUS METALS. A HARD-TO-FIND VINTAGE MANUAL THAT IS A MUST-HAVE REFERENCE FOR ANYONE WANTING TO LEARN ABOUT EQUIPMENT / TOOLING RESURFACING. THANKS FOR LOOKING! PLEASE SEE MY OTHER VINTAGE ITEMS AS WELL!