Tale of two bumpers

[haywire 440]

So these bumpers look identical except the way they are mounted. First one could be a rear bumper because of the brackets on it. But which cars/models.
The second bumper should be for the ‘61-‘62 300 and others that were listed in the interchange manual. It has bumper bolt holes through it, where the first one doesn’t. And there aren’t any welded up holes on the inside.
I feel like I’m chasing my tail.

 

[Pete Kaczmarski]

I would have to check mine but if I remember correctly the second one looks right from the back side.

 

[haywire 440]

Both of the bumpers in question look like your front bumper.
I would agree that the bottom 5 photos match your front bumper.
Stunning convertible, I’m a big fan of white over red paint schemes.