Very rare! This is an Asynchronous/Bisynchronous I/O expansion card (with cable), for NCR Decision Mate 5 (DM-5/DM-V) computers. KIT 3273-K215-V001. This unit comes equipped with a 96-pin connector that plugs into the back of the DM-5 computer, along with a 25-pin connector at the end of the cable. This unit is in excellent condition for its age (being made in the mid 1980s), and has only a few small paint chips here and there. This would make a great addition to anyone's collection or museum. My late father worked for NCR for over 40 years, and was part of the original DM-5 development team. This unit will be responsibly packed in a sturdy box, protected from moisture, and will arrive exactly as shown in the above photos.
FREE USPS PRIORITY SHIPPING! (U.S. ONLY)
On an ending note, I am still going through a bunch of my late father's collection of vintage NCR computer stuff. If there is anything in particular that you are trying to find, please let me know and I will be happy to check on it for you.
Also feel free to check out my other listings, as I am constantly adding more vintage computer items (in addition to what I already sell), as I continue to go through my dad's collection.