This two-page advertisement appeared in Aero Digest, April, 1935:
RCA OFFERS YOU A COMPLETE LINE OF AVIATION RADIO EQUIPMENT
FEATURING:
QUALITY RUGGEDNESS SIMPLICITY
LOW INITIAL COST
LOW OPERATING COST
WHATEVER your aviation radio requirements, RCA can meet them-with standard equipment backed by years of experience in every radio communications field. Several new pieces of equipment, conforming to RCA’s high standard of [...]