I just picked up this pump and it has what looks to be a factory light switch that pokes through the back skin
" opposite the crank reset" and was hoping someone could post a picture of what the knob that goes on the light switch shaft looks like. The shaft is threaded at the end.
Thanks.

That is not original. The hole was smaller with a grommet and the shaft was shorter with a dish on it. A screw driver or other item would have been put in the hole and pushed. Tokheim used this on many of their pumps. I have two 870s that are this way.

Agree w/ Matt...should be the standard Tokheim switch. Yours was added sometime later.

Thanks that helps👍 this switch is not a push in type it turns clockwise so must have been added at some point.
Thanks again.