Friends, I'm helping a local resident find a home for a 12 volume set of "John F. Riders Perpetual Troubleshooters Manuals" They were published in 1933 & 1934 and feature schematics for most brands and models available in Amwerica during those years. They are available for the cost of shipping them to your institution. The current owner desires that they be added to a public collection. If their is interest, please reply off the list. Greg Koos McLean County Historical Society Bloomington IL [log in to unmask]