Up for sale is a factory issued Operating Instruction Manual for the Altec 1611A Mixer Amplifier.  This manual does provide service information.  It includes Specifications, Schematics and Replacement Parts List.  Contains 8 pages of info. Very good shop used condition.  This is an original copyrighted document.  I charge a shipping fee so that I can combine shipping for those that want to take advantage of purchasing more than one item.
I pack for safe shipment.