The one one my '50 as far as I can tell is original,judging by the rust that was along the lower edge.
It has a rolled top edge ,I agree with Denny too,sounds like the later one you've got.

Last edited by jockbolter50; 11/26/2011 11:32 PM.

1950 Chevy Advance Design 3100 in Scotland
In the Stovebolt Gallery
More pix on Flickr.
I've definately got this truck thing in my blood ... my DNA sequence has torque settings
"Of all the small nations of this earth,perhaps only the ancient Greeks surpass the Scots in their contribution to mankind" Winston Churchill.