Artifact Details Title Dual sense amplifier 4554 A system building block Catalog Number 102729533 Type Physical object Description There is an aluminum frame and a blue plastic connector. "Dual Sense Amplifier 4554 A" is etched in solder at the insertion end. On the component side there are two round inspection stamps. Date 1965 ca. Manufacturer Digital Equipment Corporation (DEC) Place Manufactured Maynard, Mass. Identifying Numbers Model number 4554 A Etched in solder at the insertion end Other number 4554 Stamped into the front of the aluminum frame Serial number 0192088 Stamped into the side of the aluminum frame Dimensions overall: 1/2 in x 4 1/2 in x 7 in Category Component/module