There are pencil makings on the component side of the board. In the corner "OK 15965" is legible. "DEC CDC CONVERTER 4656 A" is etched in solder near the insertion end of the board.
Date
1965 ca.
Manufacturer
Digital Equipment Corporation (DEC)
Place Manufactured
Maynard, Mass.
Identifying Numbers
Model number
4656 A
Etched in solder near the insertion end of the board