Alto II Ethernet circuit board
There is an illegible ink stamped number on the wiring side. There are several hand applied engineering changes on wiring side.
Xerox PARC (Palo Alto Research Center)
||Labeled as "PWB NO." This number is silk screened on component side
||Labeled as "ASSY NO." The numbers are silk screened and the "G" is stamped.
overall: 1/2 in x 11 in x 7 3/8 in