I don't know how many years used the same sender but on my '38 it only goes in one way. The mounting holes appear to be equidistant apart but are not. If you try to mount it any way other than correct all of the screws won't go in.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.