This is vintage, old, maybe a collector's item that may be suited for a museum or similar.I have no operating system to try on it. I plugged it in and a boot screen came on (see image), so know it powered on. I WILL NOT BE SUPPLING A POWER CORD EITHER, but it does use a standard desktop power cord. I borrowed my workstation's cord to see if it would power on, which it did.
The label says;Model OCC 1 Serial Number CA 120050
The boot screen says ;OSBORNE 1Rev 1.44 (c) 1983 OCC
It is possible that this is a link to a set of the original documentation that came with it when it was new, but hard to was purchased from an Estate. I would consider it as non-working, even though I did get a boot screen when I turned it on.I know nothing of the history of this collector's computer, so it is AS-IS, NO RETURNS, NO WARRANTEE, NO SOFTWARE, NO DOCUMENTATION. THIS IS OLD (Please see all images to verify all info that is in this description, because all interpreted from the images).