farcwarts,
Here is one of the lower crosses held at the AWM.
Photo from Landon Bager
I also have one of the backside too.
In most cases (on Dr.I's) at the time it was accepted the bottom cross would have been the Balkenkreuz on a CDL field (no white) But there seems to be a full white field in the photo of the lower cross. I have seen this only in a few other photos of Dr.I's.
The first cross change directive to have the white fields eliminated only leaving the 50 white border. This can be seen in the Lechelle photo.Then the next change to the wide Eisernes Kreuz that is shown in the photo above.
So to answer your question, yes there was a white field that was cut down due to the Idflieg national insignia changes.
Lloyd...