Gentlemen,
out of curiosity I bought an Albrechtsorden Ritterkreuz (A.R. 2) with reversed swords.
The dealer whom I got it from told me that this was done by the recipient to reject the armistice of 1918.
When visiting the Lippisches Landesmuseum in Detmold (Germany) I found another example of reversed swords: An Offiziersehrenkreuz.
https://lippisches-landesmuseum.de/
Do you may have similar experiences?
Cheers,
Frank
PS: At the museum shop you can buy the following book:
Reiner Schwark
Orden und Ehrenzeichen des Fuerstentums Lippe Detmold 1778 - 1933