NOS Buick panel identification

[gegrunt]

I have this pair of NOS Buick parts that I am looking for some help with to identify. I tried the "what is this" forum and all I got back was someone saying that they were running boards for a VW bug. The parts came in a battered Buick parts box, I took some split view pictures showing both sides of the same area of the panels. I have handled NOS Buick rocker panels for cars from the 1940's in the past and I know that they are not rockers, the NOS rockers always had braces and reinforcements welded inside of them. The tiny slots that are stamped into the panels are really confusing, I thought that they were possible for the inside of a door but the longest Buick door skin that I have ever come across was 49 inches wide and the panels are 52.5" to 54" in length. Does anybody recognize these parts?

[packick]

Gegrunt:  I am not a Buick expert but these sure look line rear fender skirts to me.  I have a 1951 Packard with fender skirts and the holes at each end look the same.  On the car there is a nub where one end slides into, and on the other end there is a bolt and that secures the skirt to the car.  Anyway, that's my guess.  For what year Buick I don't know.

[gegrunt]

Joe, thank you for taking the time to reply, do you think that a fender skirt would be 54 inches long? I have never seen anything quite like that.

[NTX5467]

In the later 1950s, there were some which started with the front of the rear wheel opening and went all the way to the back bumper.  A smoooother look.  Usually to compliment the "lower, longer, wider" look of the times.

[lancemb]

They sure look to me like moldings for the inside of door and I think the slots would be to fit a door panel into.  There are coupe doors that long.

Edited April 9, 2023 by lancemb (see edit history)

[Smartin]

I was thinking the tops of doors too, but man those are some long doors.

[gegrunt]

I took some pictures of the panel laying on the floor next to a edge formed by the floor tiles to show how much of a bow there is stamped into the one side of the panel while the other edge is basically straight. I can't see in on the top inside of the door with this kind of curvature. The second picture that I added shows that the other side with the slots is straight