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A late 70s Japanese market TDK Super
Avilyn cassette of the odd L370 length that uses the X1 and X2
speed designations as well as the older B-square logo in a
plastic sleeve |

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Late 70s American market L500 that uses
both the old X1 and X2 as well as the early BI and BII
designations |

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TDK introduced this design printed on
nice, heavy cardboard in 1980, along with a similarly
designed VHS tape. These tapes were of the two-window
design, and were also used by dubbing houses and
OEM'ed by Kodak for their videotapes |

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Japanese market Super Avilyn
L500. Perhaps because of greater early adoption of Beta in
Japan, the runtime chart also refers back to the old X1 and X2
designations |

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Seemingly in an effort to
dissuade usage, TDK dropped the Beta I runtime in the blue
rectangle on the front of the L750 variant, and suggests making
a test recording on the back |

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Later variant with design
patent number |
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The 1985 L750HS with shiny
foil accenting |
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A slightly later but very
similar L750HS that drops the foil for endorsement by Good
Housekeeping. This example is particularly yellowed |
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The 1987 L750HS, evidently no longer
endorsed by Good Housekeeping |
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Japanese market TDK Super Avilyn
HS L500. In the later 80s, TDK started doing plastic tape
sleeves with clear windows on the front showing the tape inside |

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Japanese market TDK L750 Super Avilyn
(with mismatched tape) |

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Japanese market Extra High
Grade L500 |

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Labels for the Japanese
market TDK Extra High Grade L750 |

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A TDK Extra High Grade L750 |
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American E-HG variant. This
may be a later variant, but was found with this tape |

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L830 variant of the TDK
Extra High Grade |
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Later Japanese market TDK HS
L500 |

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American market E-HG L750
with a similar design |

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Labels for the American E-HG
L750 |
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After Beta hi-fi VCRs became available,
several companies started offering specific "hifi" cassettes
which were generally of a higher grade |

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Later Japanese market Extra
High Grade |

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Fairly nondescript version of the
L750HS |

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Later Japanese market HG
L500 that follows the 90s trend of nondescript (nearly
unnoticeable when not in the hand, in this case) sleeves |

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Label sheet for the 90s
Japanese market TDK HG series tapes, shared between the L500
and L750 |