Boeing & Switch direction.
Back in the early Boeing days, I'd say prior to the mid-50's all Boeing switches moved the same direction. I don't know if it was forward for on or off. Then comes the jet age, 707 and 720. Boeing is trying to sell airframes and airlines started order the airframes with switches mounted which ever way the customer wanted. I flew 727 that had been Eastern, Delta, United, what ever and one never was sure which direction was off or on. Move the switch if the light or pump comes on great, if not move it the other direction. With the introduction of the 57/67 Boeing moved to make every airframe the same. If the customer wanted them the other way, fine, but don't change it till you own it.