Maxell 90-CAS
Surviving information on the Maxell 90-CAS is thin. It appears to have been a compact audio cassette from Maxell's 1970s blank-tape line. The "90" suggests a C90-length tape and "CAS" a cassette. The Archive's sources contain no review, catalog entry, or spec sheet that names this exact model.
What the period record does show is Maxell cassettes being sold heavily through classified ads. Audio (July 1974, p.63) carried an offer for custom-loaded Maxell UDC-90 cassettes at ten for $17.00, with private labeling and other custom lengths available. By January 1978, HiFI-Stereo (January 1978, p.137) was advertising Maxell's blank tape line at discount: UDXL-C90 at $3.09, UD-C90 at $2.53, and LN-C90 at $1.78. The 90-CAS itself never appears in these listings, so its place in Maxell's lineup and its exact specifications remain undocumented.
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