At least now we know why they had the huge edge bars on the cars, so when they stuck they're head out the window and it was sunny they had shade, and raining they wouldn't get drenched. That looks like a 55 inch edge on the old brick crown Vic. The other looks to be about a 52.
Correct the 52 series will not work on the 500 series, I have both, thought they would but no go. I had to order lenses from whelen, difficult to get now unless your lucky. Ohh and both series were available in optic and non optic back in the days till end of life.