Photocopy of booklet by APSCO Stock number 2505b. This photocopy is protected by an archival quality sleeve/cover to maintain present condition. Rare copy. Contains test instructions and diagrams for those who tune player action regulators for these instruments. Contents include among others: Names of Levers and what they are used for, Stop Valves,Regulating Tempo Motor Governor, Valves, Valve Block "L", valve blocks L and E, Valve Blocks B and I, Valve Blocks A and J, Valve Blocks C,D,E,F G, and H, Pressure Regulaor, Three Valve Transmission Unit, and more. Item is in binder for protection. ...
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