I read those were retired before Korea. My flight instructor owned one.
Jim, I don't recognize those radial engine, strut braced, high wing singles in your third photo.
I had botched that post: I forgot to insert the link to Kort's posts on CAScity. I've patched that up and will include the link here as well.
Yes, it's on the 30-30 case (in turn based on an older Ballard case).