I was taking trim pieces off the 41 cab and noticed that the door seal was rather unique in construction... not sure if it was original or added on... but the stitching looked machine sewn (double need lock stitch 1/4inch apart.. to straight/tight to be hand done).
It was a piece of canvas about 1.5 inches long, and it was folded in two, and in the center was a white cotton rope. I mean an actual rope about 1/2 inch in diameter. It was sewn together like you would expect normal piping or cording to be. The was held in by the trim piece's screws.
I was out of batteries so pics are coming. Any idea if this is an original part or a mod done later on??