I spotted a  few cards at the local dismantlers the
other day, and I
wonder what they are:
  - dual-height (2 card edge fingers) with a sticker reading " MTI Model
MSV05B" and a 50-pin header at the outside edge of the card 
I think it's a tape controller for drives with a Pertec interface?  At
least that's what a "MSV05" appears to be.  Or does this by any chance look
like the following board 
ftp://zane.brouhaha.com/pub/dan/viking_scsi/qdt.jpg
   - quad-height with a silk-screened Dilog logo and
DQ130 model number
and 2 50-pin headers at teh ccard edge.