Object consists of circuit board and attached ribbon cable. "EXTN MEM" is ink stamped next to "ASSEMBLY" on component side. There is one hand applied engineering change to wiring side. Nine empty IC sockets.
Date
1979 ca.
Manufacturer
Xerox PARC (Palo Alto Research Center)
Identifying Numbers
Other number
12 79
Silk screened on component side
Other number
217129B
Silk screened on component side
Other number
217175C
Ink stamped on component side. Identified as "ASSEMBLY" number