Tape manufacturers: Difference between revisions

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===How to tell===
* The TDK logo can be found above the record tab.
* Tapes manufactured from 1978 to 1987 may have a year-week code printed above the record tab.
** The first number is the last number of the year the tape was manufactured, and the last two numbers indicate the week.
*** E.G. if the code reads "AKAF413", it could mean the tape was manufactured on the 13th week of 1984.
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