This listing is for an Original 1968 SCHEMATIC DIAGRAM only for the WOLLENSAK 5720, 5730, 5740, 5750, and 5800 model Transistorized Amplifiers. This Diagram is in good usable shape and is still fully intact. Has some stains. Has some binder hole wear and tear. Has some corner/edge wear. Has some age dis-colorization. This Schematic Diagram is in good usable shape. Copyright 3M CO. JUNE 1968. Thank-you for your interest in our listing.