Artifact Details Title Diode 1111D 4111D system building block Catalog Number 102728214 Type Physical object Description The object consists of neatly arranged passive and active components. There is a blue plastic connector at one end which is held in place by two rivets. The board is surrounded by a metal frame. Date 1965 ca. Manufacturer Digital Equipment Corporation (DEC) Place Manufactured Maynard, Mass. Identifying Numbers Model number 1111 D Printed in solder near the insertion end Other number 1111 Stamped into aluminum frame at the front Other number 4111 D Printed in solder near the insertion end Serial number 0030576 Stamped into aluminum frame at the side Dimensions overall: 1/4 in x 4 1/2 in x 7 in Category Component/module