Lots of Aermotor information on this one. Several different Aermotor catalogs in one file. Includes parts diagrams for the 602 and 702 model Aermotor windmills and an Aermotor brochure on how to assemble an Aermotor tower from the ground up. Instructions for oiling and care. Also contains several brochures describing the merits of Aermotor. 57 pages.