Thanks for the advice. Never considered itíd just pop off. I might go back and try to find it.
Yeah I lost one off of my 65 coupe back in the day from hitting a pothole (same side/wheel as yours). Thankfully my passenger heard it and we stopped. I ended up finding a spare at a swap meet and grabbed that just in case. Turns out, that spare wheel cover is the only thing I have left from that car after selling it. Makes great wall decoration.