This is a B155 module with a green board and a blue plastic extraction handle attached by two rivets.The component side is marked with three inspection stamps. The square stamp reads "Tested 3 A.M.T.8". "HALF BINARY TO OCTYL DECODER B155B" is stamped on the solder side.
Date
1966 ca.
Manufacturer
Digital Equipment Corporation (DEC)
Place Manufactured
Maynard, Mass.
Identifying Numbers
Other number
10-66
Found printed on solder side of module
Part number
-3v K-116
Found printed in white on black rectangular component