This R303 module has "NP" printed throughout the green board in red. On the component side there are three round inspection stamps. "FLIP CHIP" is visible between the metal rivets that attach the left extraction handle. There is a "MICROPOT" component on the left side with three wires. "INTEGRATING ONE - SHOT R303B" is printed on the solder side along the lefthand edge.
Digital Equipment Corporation (DEC)
Found stamped in white on face of red plastic extraction handle
Found printed ion the solder side parallel to the extraction handles.