Interesting "1-USA" Vintage License Plate
 

First time I have ever seen this variant - anyone know when and by whom it was made?

Link to USA-1 License Plate auction

https://i.ebayimg.com/images/g/UooAA...vJ/s-l1600.jpg

This site shows a similar plate in 57 - https://ncplates.weebly.com/chevrolet-plates.html

but says they were all colored backgrounds with white letters, and the font is a little different too. If you open the pic from this site in a separate window and enlarge it, the holes are oval like the 60's USA-1 plates, not the rectangular holes present on the eBay plate. So I would guess the eBay plate would be older than 1957? Or maybe an unlicensed knock-off of the 57 plate made by some other vendor back then?

Here's another. Slightly different font and spacing, but same rectangular holes: https://www.ebay.com/itm/Rare-Vintag...-/184482779875