Close up view of a Xerox Alto RAM board 16K dynamic MM5280D RAM chips, which have a silkscreen production date code of mid 1976. Click image for larger view.
Actual RAM boards are too large for my flat-bed scanner, so I took two scans of each RAM board imaged. I also have a third similar board, that's the source of the close up RAM chip view. Each board is 128K I believe, 16-bit.