Reference Generator printed circuit card
One-sided printed circuit board with components and a ground plane on the top. There are several stamped and one printed QA designations. There is a 26-pin PCB connector on the back edge of the board.
Xerox Data Systems, Inc. (XDS)
||Screened on right side (pins facing away) top of board, near the pins.
||Screened front (pins facing away) top of board.
||Screened on left side (pins facing away) top of board
||Printed on back side of the board at the front (pins facing away).
||Screened on front (pins facing away) top of board. A small raised '0' to the left of 'HT12.'
overall: 1/2 in x 4 1/4 in x 4 3/4 in
SAP Collection, Computer History Museum