Nakamichi SX-C90 Ferricobalt high bias cassette tapes. I purchased these new in the eighties and recorded on them only once using a Nakamichi BX-150 deck. About 35 years ago these cassettes were boxed up and stashed in the back of a closet (climate controlled) that I recently cleaned out. Cassettes are in excellent condition. Clean, not played many times. The outside cases are in good condition, not cracked but do show some scuffing. The photo of the single cassette is representative of the rest. Titles recorded on them will vary. Thanks for looking.