Gentlemen,
here's something I think I was lucky to get:
Ribbon #4: Princely House Order of Hohenzollern, 3rd class w/o swords, with crown. According to Nimmergut, it was awarded to Beamten and officers up to Hauptmann. 71 awards from 1905-1927 (continued to be awarded in Weimar times).
Ribbon #5: If I am not mistaken, this is the Star of Brabant. The combination with the RAO suggests a Knight 1st class with crown.
Now there weren't many of them around... actually four, and seven for the Knight 2nd with crown. Nimmergut lists all recipients (well, only six for the 2nd cl). But only one of them was an officer, a certain
Major der Landwehr Hans Eberhardt, Handelsrichter (commercial judge), on 5.6.1918
Should this be his bar?
Regards
Chris