Bates Style Headlight Identification?

Hey Team,

Wondering if someone can recognize this 5-3/4" bucket. Not sure where I got it; probably some long ago swap meet. I don't have the ring for it, but would like to pick one up somewhere.

No names anywhere, no high beam blue dot, and the shape of the tabs inside the bucket don't match anything that pops up with a prodding of the Googles. The most obvious variability seems to be the mounting tabs, so here's some pics of those.

Any guesses?

If it's a Bates, it will be stamped into the shell.

Possibly Drag Specialties or Custom Chrome brand.