This item is part of five items that are attached togeth comprises five (5) items: A: PCB USI M8270 B: PCB UBA Control Board M8271 C: PCB DWX1 VMD M8272 D: PCB UAI M8273 E: Backplane. There is a red sticker attached to the bottom of the board with the letters "PA". There is a tag attached to this board which reads "PCO #9 installed ECO-1 installed 20 Sept 77" and "runs UBA.EXE 3rd shift July 2 1977 L.W./U.S.". There are red LEDs on this board
