Today there is a request for hazard switches in the classified forums which leads me to go to the stash and see what I have to help. Pawing through the group, I see plenty of differences. Of course this brings up more questions. We know about the change to the back lit, round pull knob style switch on the North American 240's in 73, and the shorter wires on the 72 switch (6 pin connector wires), but I was surprised by a couple of differences I didn't know about. The marking on the hand