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Erla Circloid

+- 1925

Crystal Radio L.M.T. Radiojour +- 1922 / 1924

Clapp-Eastham HR +- 1921 / 1922

Headphones Seibt / Firth, John +- 1922

Ericsson Crystal Detector +- 1923

Stewart Warner Berkley +- 1934

Murdock Variable Condenser A366

+- 1916 / 1922 ?

Tri-City Model W-1 +- 1924