Read the sad reason in the item description:
Just in case this specific keyboard is offered for sale, according to the seller the serial no. printed on the label was 80749 E09.Up for auction are the internal parts of an NCR Model HO150-STD1-12-17 keyboard. The frame, keycaps, and connection cord are Not included. The parts shown are all that I have left after a buyer returned the NCR keyboard to me. Yes, he kept the keycaps, cord, and NCR case.....
Edit: now learned the seller did not have to issue a refund after all, and modified the thread title accordingly