12 BIT MF DAC 1566D system building block
The object has a green board with an aluminum frame and a blue plastic connector. There is a row of eight potentiometers. There are also three small rows of resistors and diodes.
Digital Equipment Corporation (DEC)
||Printed in solder at the insertion end
||Stamped into the aluminum face of the frame
overall: 1/4 in x 4 1/2 in x 7 in