The object consists of 16 transistors arranged in neat rows among numerous capacitors and resistors on the component side. Many of the diodes leads have loops where they go through the circuit board. There are two barely visible quality control stamps on the component side.
Date
1963 ca.
Manufacturer
Digital Equipment Corporation (DEC)
Place Manufactured
Maynard, Mass.
Identifying Numbers
Model number
1981A
Etched in solder toward the insertion end of the board
Other number
1981
Engraved on the metal frame at the extraction end
Serial number
0056022
Engraved on the side of the metal frame toward the extraction end