The Senter brothers got together with Jack Andrews in 1947 and formed AnSen (first part of each last name) Automotive Engineering.
They developed lots of "go-Fast" parts for hot rodders and racers.
The wheels are Ansen Sprint wheels, sometimes called Slotted Mags and sometimes referred to as Jellybean Mags for the shape of the holes.
Ansen developed a lot of great stuff that was popular with all kinds of car owners, and the wheels might have been the most popular thing they made.
Mine have the right lug spacing but they are a tad bit too wide for the Midget. However I enjoy the fatter tires they allow me to run.
Here's a story in Hemmings about Sol and Louis Senter and Jack Andrews:
https://www.hemmings.com/hmn/stories/2006/12/01/hmn_feature28.html
Louis Senter was inducted into the National Sprint Car hall of fame (in 2009 IIRC) and you can find details about him and the things he did online with a bit of searching.
I felt the wheels would be the perfect thing on my amalgamated frogeye Midget with the Nissan running gear, Miata seats and early Midget (Mk1) boot. Right now I'm pretty happy with how it looks, I need new seat covers soon and will need to stay ahead of the rust issues, but it's giving me a lot of smiles per mile.