McGraw-Hill DETECT-O-SCOPE electronics repair chart for TRANSISTORS, is a FAULTY PARTS FINDER that unfolds to 16-1/2" x 21-1/2", but has been folded for decades. Printed in dark green. There is wear on the fold lines, with disruption in the printed color, tiny pin-point holes where the folds intersect, and other light bends. Some tiny rough edges, some small discolorations in margins. Some fold lines are darkened. There are NO pin holes or tape marks. Plain on the backsides. Good condition, still all legible. Dated 1963.

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