One (1) reference voltage regulator with light green circuit board and 11 large components and a number of small components attached to the front. An aluminum handle is attached to one edge, with a white and orange paper label affixed to the face of the handle. The label is marked "SCIENTIFIC DATA SYSTEMS SANTA MONICA CALIF." "REFERENCE VOLTAGE REGULATOR SCIENTIFIC DATA SYSTEMS" is printed on the front of the module in white. The back of the module is marked in black with three inspection stamps.