I picked these up a number of years ago and in sorting through
some of my stuff, I rediscovered them. They seem to be an early
version of a 3.5" floppy disk system, before what we know today
as a 3.5" floppy became standard.
http://www.ubanproductions.com/Images/drivette1.jpg
http://www.ubanproductions.com/Images/drivette2.jpg
http://www.ubanproductions.com/Images/drivette3.jpg
http://www.ubanproductions.com/Images/drivette_disks.jpg
Note, one of the disks is labeled 3 1/4".
The fact that Dysan made a disk for this thing leads me to
believe that someone must have used it.
The markings on the drive are:
Tabor Corp.
Westford MA
Drivette Microfloppy Disk Drive
Model TC500
If anyone knows what this drive was used in (if anything), I
would be interested in knowing.
--tom