I found this on ebay this am and thought it a clever idea, not period correct but non the less a neat idea. Put a small motor cycle battery in the fifth hole for starting and let the mag take over for running. Keeps the wiring to a minimum. I am not connected to this auction in any way.
Thats interesting, I would put the original switch back on the front and really confuse everybody.
That is clever. Those coils look nice and snug in the box. I'd drill holes in the bottom of the box towards the front so you could use your finger to push each coil straight up until it can be easily grabbed - since it's already a nice custom box and all.
Who ever made the box did a real nice job. I would have used a correct switch but you use what you have sometimes. I wonder what the brass plate says. The first photo in the ad shows the back and when I first saw it wondered what it was about, so I looked.
I think the cut out on the back is for a black plate, standard switch and ammeter.
I think you're correct,from the shape and mounting hole locations its a 26-27 oval one.
I don't think that we always have to be correct, just having fun.