Before revision: Sanyo Micro-Pack 35 tape recorder showing cassette being inserted Sanyo Micro Pack 35 and rebadged devices Channel Master 6546"Channel Master in Diversity Actions", Billboard, 12 October 1963, p. 52 and Westinghouse H29R1C.
After revision: Sanyo Micro-Pack 35 tape recorder showing cassette being inserted Sanyo Micro Pack 35 was a portable magnetic audio tape recording device, developed by Sanyo in 1964, that employed a special tape cartridge format with tape reels atop each other.Techmoan: Forgotten Format: SANYO Micro-Pack 35 Tape Recorder, YouTube, published on 31 August 2017TheThe unit was rebadged and sold as thethe Channel Master 6546"Channel Master in Diversity Actions", Billboard, 12 October 1963, p. 52 and Westinghouse H29R1C.