Chev & Ford CMP Door Interior

[Bob Moseley (RIP)]

Hi all

Here is another query. I have been led to believe that the radiating line indentations on the inside skin of the doors was different between the two models. The Ford lines radiated from an impressed circle that allegedly was stamped for the possible provision of a window winder mechanism, whilst the Chev lines joined at a point. However whilst perusing the two manuals, MB-C1 (B-2) & MB-F1 (B-4), both diagrams show the "window winder impression."

Please explain.

Bob