W501 module with green substrate and a tan, plastic extraction handle attached by two rivets. Handle reads "DIGITAL EQUIPMENT CORPORATION MAYNARD, MASSACHUSETTS." Reverse side of substrate (with solder joints) reads " SCHMITT TRIGGER W 50F 12-66" along the edge. Obverse side has several components and is marked with four inspection stamps; "FLIP CHIP" can be read through substrate, between rivets.A repeating pattern of "NP" in red letters is visible across the substrate.
Digital Equipment Corporation (DEC)
Maynard, Massachusettes, U.S.A.
Located on outer-face of tan, plastic extraction handle