Binary to octal decoder 1151 4151 4153 J System Building Block
Attached is a small paper tag that reads "reject missing copper". On the solder side an attempted repair is visible with heat-damaged and lifted land-patterns.
Digital Equipment Corporation (DEC)
||1151 4151 4153 J
||Etched on solder side
||On end of frame
||Etched on frame
overall: 1/2 in x 7 in x 4 1/2 in