These are the MA54 and MA70, the originators of TDK's metal tapes.
Here you can enjoy comparing the early and later versions of the MA.
These are well-maintained MA54 and MA70 models with their tabs intact.
[MA]
Released on July 1, 1979. Launched as TDK's standard-class compact cassette tape for metal bias. Like the MA-R mentioned later, the magnetic material used was TDK's proprietary metal powder, FINAVINX. At the time of release, only 46-minute and 60-minute versions were available, similar to the MA-R. However, a 90-minute version was added on March 1, 1980. In July of the same year, some product specifications were effectively changed, and detection holes for the auto tape selector for metal bias were added to the top surface of the cassette half. After several improvements, production, shipping, and sales ended in September 1998, being replaced by the MA-EX mentioned later.
Thank you for looking.
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Daily Cleaning: Use a soft brush or damp cloth to gently wipe away dirt. Avoid harsh chemicals. For mesh areas, use diluted mild detergent and a soft brush.
Drying: Air dry in a cool, shaded place after cleaning. Avoid direct sunlight or high heat, which can cause fading and glue deterioration.
Storage: Stuff with paper to maintain shape when not in use. Store in a dry, ventilated area to prevent mold. Rotate between multiple pairs to extend lifespan.
Usage Notes: Designed for basketball. Not recommended for hiking, long-distance running, or other specialized sports where different performance features are required.
Il prodotto è arrivato in buone condizioni e nei tempi previsti. Corrisponde alla descrizione e sembra di qualità discreta. Nel complesso sono soddisfatto dell’acquisto.