To keep things neat and unify the details I'm adding the following to this thread rather than placing it in another separate thread
The request was where are the date stamps located for the inner and outer door sections.
I've found the inner dates stamped in one of two locations. Date patterns differ from different production periods and the location of the date may be due to different dies and the location for the date ingot on each.
Outer skin date - look along this inner lip hidden by the vent window or outer belt line once the door is completely assembled (green arrow) Purple arrows show where the inner skin date stamp was located