Sorry for late answer, very lot of work before holidays and very hot weather!! now on holidays for 3 weeks :slightly_smiling_face:
i discover and don't know why i make a mistake in description of the lever, it's not a "loop" but the securing clamp..:face_with_rolling_eyes:and the specific screw and nut
it's a chromed one but brass under it. if it could help ( same dimensions you mention Steve).
i Email you tomorow with pictures
I have one of these switches. OFF-T-H=L and no lucas mark. It has paint on the bakelite and no dial. No idea if it is an expensive part, but I'd be interested in exchanging it for something equally as rare for my '41 WM20. I'm in Hawaii so USA shipping would be $7 but to Aus and UK, it will be a lot more.
