Located on reverse side of substrate, top-right corner
Located on large, red component
overall: 1/2 in x 2 1/2 in x 5 1/2 in
W607 module with green substrate and a tan plastic extraction handle attached by two rivets; red 'B' hand-written below model number. Side of handle reads "DIGITAL EQUIPMENT CORPORATION MAYNARD, MASSACHUSETTS" in raised letters. The reverse side of the substrate (with solder joints) reads "PULSE AMPLIFIER W 607 B" along the edge. The obverse side is covered by a variety of components. Two black inspection stamps are located near the handle, one is rather faint. A repeating "neLco" pattern in red print is visible on the substrate.