This is a six position SAGE module with one single vacuum tube installed and one potentiometer installed. There are also seven logic boards, five of which have transistors. There are two twenty-four contact parallelogram connectors in the rear. The handle has release levers on each side, an identification tag with number too faded to read, a small round black sticker, and an inspection stamp which reads "K IBM 90" on the frame. On the side of the handle is a date stamp "JUL 1958".