[von Lutz]

1. My German is a bit rusty but I think the caption on the back of the print says:
On the trip to the east we meet a transport-train with damaged war-equipment from the battle in the Balkans.
The aircraft appear damaged, note the dented oil cowler cowl. Wheels up landing? Also the wings appear to be laying on the floor of the railcar and the second aircraft as a wing laying against the fuselage. Not the way you would transport flyable aircraft. So the train is coming from the east, and how would the photographer heading east, know where in the east it's coming from??

3. Bf 109G-10? Large wheel bulges and short tail wheel probably not a K.

von Lutz