Sprue-ce Goose:
Do you mean the clear plastic cylindrical container with the large, feric oxide coated aluminum data platters so beloved by Geeks of the era?
I didn't know those still were in use !
To the best of my knowledge, except for museums, they aren’t — I think there might be a 2314/2319 enshrined in the Smithsonian’s “Information Age” exhibition. I was referring to an incident that happened in 1973.
Take a look at this dinosaur at http://www.staff.ncl.ac.uk/roger.broughton/museum/DASD/200426.htm
The TRAVEL cases were black, opaque, and resembled nothing so much as an evil curling stone (for Canadian tiddlywinks or Chess on Ice).
Another point: I was a Geek of the era.