Alto II Orbit Input Module circuit board
Wiring side has two hand engineering changes and handwritten label on component side reads "TESTED OK, 8-10-78, 10-25-80, 2-10-83".
Xerox PARC (Palo Alto Research Center)
||Ink stamped on wiring side.
||Labeled as "PWB NO." This number is silk screened on component side
||Labeled as "ASSY NO." The numbers are silk screened and the "E" is ink stamped
overall: 1/2 in x 10 1/2 in x 7 3/8 in