Looks like the "Mainframe" is an IBM Series/1 which is not a Mainframe, and I would say has limited appeal to collectors as there are few resources out there as the software is all fully licenced so its had to make legal copies.
Dave > -----Original Message----- > From: cctalk <cctalk-boun...@classiccmp.org> On Behalf Of Electronics Plus > via cctalk > Sent: 11 January 2019 17:50 > To: 'General Discussion: On-Topic and Off-Topic Posts' > <cctalk@classiccmp.org> > Subject: IBM in TX > > https://drive.google.com/open?id=1xwq1JKaMPVXLXJwhocWf9qTogANG2iy > e > > > > This is the pic I was sent. Original msg should have said PS/1 and PS/2. > > > > Cindy Croxton > > Electronics Plus > > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus