What is this tape cartridge?

I was checking out the local surplus shop looking for a 19" rack for my latest computer project, no luck there but I did find some other stuff. What I'm really wondering about is this tape cartridge I found: COUSINO Echo-matic II Self Threading Tape Cartridge Orrtronics, Incorporated Toledo, Ohio, USA It's quarter inch tape in a clear case approximatly 1" x 3.5" x 5" in size, and rounded on one end. The actual tape reel is about 2.25" and has almost no tape on it. The tape looks to be a continous loop. Does anyone have any idea what this is? Zane | Zane H. Healy | UNIX Systems Adminstrator | | healyzh(a)ix.netcom.com (primary) | Linux Enthusiast | | healyzh(a)holonet.net (alternate) | Mac Programmer | +----------------------------------+---------------------------+ | For Empire of the Petal Throne, and Traveller Role Playing | | see http://www.dragonfire.net/~healyzh/ |