Here's the second photo showing one of the Bulgarians with his German fiancee. (At least that was the story the seller told me but it could just have been one of the usual Ebay sales phantasies as well.)
Zoom of the insignia on his uniform. What rank does he have?
Backside of the portrait with the stamp of a photo studio.
Zoom of the sudio stamp.
MARSZAŁKOW...A 129 TEL. ???-4?
Probably that refers to Marszałkowska Street in Warsaw, an important road in the city centre (http://en.wikipedia.org/wiki/Marsza%C5% ... et,_Warsaw
From around 1900 to the 1930s there was a photo studio Bernardi in Warsaw's Marszałkowska Street 129 (http://www.warszawa.ap.gov.pl/pub/Wykonywa_sie.pdf
, p.11). Later the studio must have had another owner but remained in operation till 1944. One of the officers in the 1944 Warsaw uprising, Eugeniusz Lokajski, was killed by an artillery barrage in the studio on Sept. 25th, 1944 when he tried to salvage photo equipment there (http://en.wikipedia.org/wiki/Eugeniusz_Lokajski
You do not have the required permissions to view the files attached to this post.