I think these are an aftermarket hubcap from the late 50s- early 60s when swapping hubcaps on a car to make it "Kustom" was popular. The '57 Dodge Lancer 4 bar spinner and the Olds Fiesta 3 bar spinner were extremely popular for this.
That looks like a combination of several styles of factory caps; if you didn't copy anything directly, you wouldn't get socked with licensing and copyright infringement fees.
The real thing that tells me this is not a Chevy cap, is the Chevys that used the crossed flags, always used the Chevy flag in red on one side, usually the left, and the checkered flag on the other side. These might be JC Whitney or some other accessory company caps.
Do they have any markings or writing on the backside?