Shoebox custom trim identification

Can someone help identify what car or cars this "hockey stick" shaped trim comes from that seems to work well on shoeboxes? Look closely at the shoebox on the cover of the Thunder Road Flathead guide, and this one I took a pic of at Paso years ago. Any ideas?

 

Hard to tell from the pic, looks like 54 Olds to me

 

55 pontiac trim looks like a hockey stick and was used a lot in the 50s on the fords. a nrrow version and a wide version were available. I have a set of the narrow I am going to put on my 56 ford sedan one of these days. Took me 4 years to find it!!!

POP

 

The Paso car looks like '54 Olds; the Thunder Road car looks like '55 Pontiac. Both work well on shoeboxes.