A neighbor is cleaning out some stuff the former owner of her house left be hind several years ago. Included is a roll of 2 1/4" wide highly polished aluminum?? tape. The code on the box is 4024603-1. The same code is on th e spool itself. A date handwritten on the box is 7/24/76. Googling the par t number seems to indicate it is some sort of recording tape, but I can't f igure out what kind of recorder it it would go on.
Reel to reel metal tapes of that era were no wider than 1/2", if my memory serves me correctly. This tape seems to take a permanentcrease/depression if you push on the surface. It almost looks like the tape in an old lie de tector machine, but those used regular pens from what I have seen on TV(nev er had one myself).
Anyone have any ideas what it was used for, and what I could do with it (po lite comments only please).