please help ID these wheel covers

I am helping out my neighbor whose husband passed away about a year ag, sell a a garage full of misc car parts going back to the 40's and 50's. i have 2 wheel covers i cannot ID. Are they OEM, aftermarket? There is a connecting plate that attaches to the back side of the cover. I believe the center cap where the shield is comes off to access the lug nuts. Thanks.

im going to guess late to early 50s 60s pointiac

Looks like 1983 Monte Carlo to me.