RCA Radiotron Tube 1927 Ad.
RCA Radiotron Tube 1927 Ad. This color December, 1927 ad states A Radio set is as old as its tubes. Radiotrons throughout are the best insurance against tube troubles and the best guarantee of long life. Picture shows tubes in RCA Radiola 28 Super Heterodyne. Magazine tear sheet picture is taken through plastic and may show wrinkles or crookedness that is not in the ad. This original magazine tear sheet measures 10 inches wide by 13 3/4 inches tall.
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