A MAN-3A LED display (left) shown with original Monsanto MAN-3.

Monsanto MAN3 LED displays, shown with packaging.

These rare pieces show MAN-3 displays under construction. Metal leadframes held the leads of each display in place until the epoxy had cured. Afterward, all but one pin would be cut from the frame, so the LED displays could be tested.

Monsanto calculator display module with nine individual MAN-3A digits on a carrier PCB.