Any audio freaks out there must know what these are... very rare and discontinued Sony Super Metal Master audio tapes, each comes with an aluminum carrying case with rub on lettering sheets and silver labels for the case. Each tape has a white heavy ceramic composite shell to absorb vibration. I bought a box and used them only once, professional graded 90 mins tapes. Can kick Minidisc's butt any day! hehe
The tapes are absolutely mint (used for master copying some CDs I have, played-back once or twice), all labels and rub on lettering are untouched.
Want to trade for an Ericsson HBH-10/15 Bluetooth headset... Just trying here before I decide to eBay them... Thanks for looking! email me at firstname.lastname@example.org