Artifact Details Title Dual flip flop 4202 D system building block Catalog Number 102729545 Type Physical object Description The board is surrounded by an aluminum frame and a blue plastic connector. On the component side there is a round inspection stamp in one corner. "DUAL FLIP FLOP 4202 D" is etched in solder above a grid lettered A-Z. Date 1965 ca. Manufacturer Digital Equipment Corporation (DEC) Place Manufactured Maynard, Mass. Identifying Numbers Model number 4202 D Etched in solder near the insertion end Other number 4202 Stamped into the front of the auminum frame Serial number 0060160 Stamped into the side of the aluminum frame Dimensions overall: 1/2 in x 4 1/2 in x 7 in Category Component/module