One (1) R181 module with green substrate and a red plastic extraction handle attached by two rivets. The handle reads "DIGITAL EQUIPMENT CORPORATION MAYNARD, MASSACHUSETTS" in raised letters and "018" is incised between "CORPORATION" and "MAYNARD." The substrate on the solder-side reads "DC CARRY CHAIN R181C" along the edge. There are three black, circular inspection stamps near the handle on the component-side between the rivets. A repeating "neLco" pattern in red print is visible on the substrate.
Date
1964 ca.
Manufacturer
Digital Equipment Corporation (DEC)
Place Manufactured
Maynard, Mass., U.S.
Identifying Numbers
Model number
R181
Printed in white on the face of the extraction handle
Other number
018
Incised on the solder-side of the handle
Other number
181C
Printed in solder on the solder-side of the substrate