I have conclusively discovered that there were NO inter-war awards of the Royal Victorian Order to Germans. However let us look at the picture the subject is certainly not in his first flush of youth and could quite likely be in his 50's. The pictue looks as though it is pre-WWII. Also I notice that after his EK he is wearing the Order of Hohenzollern (possibly the Princeley Order). Now look in the pre-war awards there is one which sticks out. Prince of Wales visit to Sigmaringen on the marriage of King Manoel of Portugal, September 1913, where and MVO 4th class was awarded to Captain Fritz Wehr, Baron von Schonau, 8th Gendarmerie Brigade. He would have been late twenties -early thirties at the time which would fit in with the time scale of the photo.
All the best,
Paul