[RADIO--EARLY]. Collection of approximately 40 offprints, catalogues, advertisements, promotional material, and patent information, etc. all relating to the development and promotion of early radio. V.p. (some Berlin and Vienna), v.d. [c. 1900-1905]. Some illustrated. Approximately 40 items, various sizes (mostly 8vo and 4to), mostly wrappers or self wrappers (some pictorial), condition overall good. (40)