All-Wave Signal Generator, likely a model 65A or 65B.
Burndept Erith model 267 Vintage radio five valve all wave superhet
Rare 1936 PHILCO brochure/leaflet - EMPIRE RECEIVER - All wave Superhet
1937 GEC AC All-Wave 5 BC3850 Walnut Cased Art Deco Valve Radio Restoration/Prop
Vintage 101 Short Wave Hook-Ups Published by Short Wave Craft booklet
Vintage US NAVY WAVE BLACK SERVICE DRESS TIE & Chief Petty Officer Cap w/ Pin
Bush Vintage DAC10 Bakelite Vintage 1950s Radio
