One (1) R603 module with green board and a red plastic extraction handle attached by two rivets. The handle reads "DIGITAL EQUIPMENT CORPORATION MAYNARD, MASSACHUSETTS" in raised letters on the solder-side. The board on the solder side reads "PULSE AMPLIFIER R601C" along the left-edge and "4-65" along the right. There are two black, circular inspection stamps near the handle on the component-side.