These are scans from documents found with the Binson Echorec. Some may be copies of copies, but most seem to be original to the unit when sold. Note the Guild contact info on the schematic
ECHOREC DOCUMENTS (click images to enlarge)
Binson Echorec 2 Model T6F-A Schematic Click Here for full size PDF of Schematic(15mb)
Binson Echorec Manual (partial)
Click Here for full size PDF of Partial Manual(22mb)