The 4A is a two speed unit. I have several NOS or gently used single speed switches. The 2 speed is like hens teeth.I am doing this car for a customer, so I would like it to be correct. When it came in , it had a household lamp switch in it, and that just will not do. Some one else took the interior apart(with explosives from the look of it), and several parts are missing. I also need the "back" of the grab handle that is molded into the RH lower dash cover. What a mess!