Artifact Details Title Relay 1802D system building block Catalog Number 102728527 Type Physical object Description The object consists of a green board surrounded by an aluminum frame and a blue plastic connector. There is a large "Clareed Relay" in the center of the board. On the other side there is a printed circuit and a lettered grid from A-Z. Date 1963 ca. Manufacturer Digital Equipment Corporation (DEC) Place Manufactured Maynard, Mass. Identifying Numbers Model number 1802 D Printed in solder near the extraction end Other number 1802 Stamped on face of aluminum frame Serial number 0045256 Stamped into the side of the aluminum frame Dimensions overall: 1/4 in x 4 1/2 in x 7 in Category Component/module