This is an unusual jeep. It appears to be made of metal. Given the PRODUCTION ENGINEERING label across the windshield, it’s possible this was created by the Production Engineering Corp, out of Minneapolis, Minnesota, which specializes in sheet metal projects and other custom works. The company was launched in 1957, so it is possible.
https://www.facebook.com/marketplace/item/1288581968729325
“Probably used in a factory”