Located on reverse side of substrate, top-right corner
overall: 1/2 in x 2 1/2 in x 5 1/2 in
R405 module with green substrate and a red plastic extraction handle attached by two rivets. The side of handle reads "DIGITAL EQUIPMENT CORPORATION MAYNARD, MASSACHUSETTS" in raised letters. The reverse side of the substrate (with solder joints) reads "CRYSTAL CLOCK R405D" along the edge. The obverse side is covered by a variety of components. a black inspection stamp is located near the handle. A repeating "neLco" pattern in white print is visible on the substrate.