Most Often Needed Radio Diagrams, Volume 1
by M. N. BeitmainRadio Diagrams and Servicing Information from 1926 to 1938. Shows circuit diagrams for 600 of the most commonly found radios of that time. A valuable resource for restorations.
Radio, Wireless Telephone and Wireless Telegraph Equipment
High quality reprint of early (1920s) Montgomery Ward catalog of wireless equipment. 32 pages of radios, kits, tubes and books as available 70 years ago. Sorry, you can't order from this catalog! 0.2 lbs, 7" x 9.5", 33 pages.
Switch - Carling, Footswitch, SPST, Off-(On), Screw Terminals
Carling, SPST footswitch, Off-(On), momentary, normally open with screw terminals. Note: Off-(On) switches may sometimes be referred to as Off-None-(On).