A range of cameras taking a disc-shaped sheet film, which is rotated to allow 8x11mm exposures positioned on it in a circular manner. Thus allowing to built a very flat camera. Quite popular for a short time.
A system designed by Kodak and taken over by a few other manufacturers. Only two manufacturers made film.
I was bidding for Rollei E27 flash(cheeky but extremely long recycling times) esp., for the sync-cable with Rollei lock and won that for Euro 2.50 but the seller put this camera along with two un-used camera straps, EOS body and lens caps, maps of the town and two post-cards.
* I have no idea about the disc-camera, but on pressing shutter it makes horrible noise.
With films more scarce than those cameras that may be an academic question.
On my agenda there is that project to exchange the incorporated battery. I did not find time for it yet. At first glance there seems no way to open the camera without harm. Though there might be a trick to it.
I do not know whether Kodak offered a re-furbishing in that case. Information on these cameras is scarce.
(I would appreciate if someone could make me wiser about Kodak having offered such service.)