The object is a box to house terminator electronics. The bottom of the box is a female connector.
Scientific Data Systems (SDS)
Santa Monica, Calif.
||Stamped on the teal connector
||Written on a piece of masking tape on the top of the object
||Written on a piece of masking tape on the side of the object
overall: 3 1/4 in x 4 1/4 in x 1 3/4 in
Gift of Rudolf F. Wrobel