On 12/13/19 8:22 PM, Chuck Guzis via cctalk wrote: > On 12/13/19 5:11 PM, Bill Gunshannon via cctalk wrote: > >> I never saw any flippies commercially made but many >> companies made punches for flippy 5.25" disks. I always >> had to make my own for 8". >> > > They were standard products. Let's see if I can find a period ad... > > Well, not an ad, but a precise description: > > http://bitsavers.org/pdf/3M/3M_Diskette_Reference_Manual_May83.pdf > > Page 8, top illustration. 3M added an "R" to the stock number for > "reversible". I have a few in my stash.
Must have been targeted at the home market as I don't remember ever seeing them in any of the supplies catalogs I dealt with. And there were numerous white papers talking about why it was a really bad idea to spin floppies in both directions. bill
