Signedon circular ornament in grill: Crosley / DYNACONE / TYPE E
FunctionTransducing electrical signals into sound waves
Historical AttributesListed in "Vintage Radio 1887-1929" M.L.McMahon, Vintage Radio, p207. "Crossley Dynacone; 1927; $22.50".
radio museum lists it at 1928.
Related Workshttps://www.radiomuseum.org/r/crosley_dynacone_type_e.html