Relay 1807 A System Building Blocks
Digital Equipment Corporation (DEC)
||Etched on metal frame.
||Etched on metal frame on right side.
overall: 7 in x 4 1/2 in x 1/2 in
Printed circuit board in an aluminum frame with many components that include: resistors; transistors; capacitors and relays. "1807" etched on frame.