One side of the board contains various active and passive components. The board is surrounded by an aluminum frame and a blue plastic 22 pin male connector. There are two inspection stamps on the component side of the board. "Drum NRZ WRITER 4518 C" is printed on the solder side at the insertion end above the grid lettered A-Z.
Date
1965 ca.
Manufacturer
Digital Equipment Corporation (DEC)
Place Manufactured
Maynard, Mass.
Identifying Numbers
Model number
4518 A
Printed on the solder side of the board near the insertion end