Which four-way selector set do you have. There are two types, the Sturtevant, and the Robbins.
The "Sturtevant" has Safe=left Semi=top Burst=right Auto=down.
It also has a long rectangular looking selector with parallel grooves running the length of the knob.
The "Robbins" has Safe=left Auto=top Semi=right Burst=down. It also has a round looking selector with groves moving out from the center of the knob, like spokes.
I am interested, particularly in the Sturtevant model.
Do you also have the sticker/label?