The object is a 2 piece door with front and back panels screwed together. There are 2 hinges on the left and a latch on the right.. The front panel has similar 3 control areas. Each has 32 red LED indicators and 7 miniature toggle switches. The groups are labeled SMI/CBI, CBM/SUI/LPI and SM. There are 5 "Centronics" style connectors on the bottom edge. Inside there are 3 identical fiberglass PCBs with the switches and LEDs mounted to them. The PCBs also have DIP integrated circuits on them.