FS : IBM Magnetic cards for IBM selectric "compocarte" (?)

[Al Kossow]

On 1/3/20 1:39 PM, Mike Stein wrote:

> I've got a couple of the drives for those cards somewhere in case someone needs/wants one; rollers to feed the card in and out and a solenoid ratchet to move the head across track-to-track. Wonder if you could build an 80-column card reader out of one... ;-)
>

Is the on-card format documented anywhere?