At one end of the bard there is a blue plastic connector. Bordering the rest is an aluminum frame. "DELAY 4301 L" is printed on the solder side above a grid lettered A-Z.
Date
1965 ca.
Manufacturer
Digital Equipment Corporation (DEC)
Place Manufactured
Maynard, Mass.
Identifying Numbers
Model number
4301 L
Etched in solder on the circuit side at the insertion end
Other number
4301
Stamped into the front of the aluminum frame (this number is also handwritten in black in on the side of the frame)