The 5132 and 5133 were similar to the post war 022 switches but with newer inside coil parts. I don't like the 5132 series switch because there is a yellow wire inside that will burn out, it's too small a wire, and then cause a short to happen.
I still like the old 022 switches.
A possible reason for the automatically controlled switch on some pre war 022 switches can be similar to the 224E numbering. It was because it was modern at the time of manufacturing.
Lee Fritz
