Patrick Finnegan asked: They appear to have a Westinghouse (underlined W in a circle) logo on them, next to a diode symbol marking polarity. Next to that is the number "18840100" (part number?) and "8206" (date code?). That part number could also be a house number. It sure looks like a Control Data number. All of their components' part numbers for the small computers started with 16 to 18 and were eight digit part numbers. Billy