Ah ...
Alois Jakob (Fw.) the owner of the photoalbum from which this picture is extracted was effectively in 10./JG 11.
Better like this...
Are we reading "Bruder", wrote on picture?
And you can wisely compare with the following photo:
http://www.me109.info/display.php?a=e&fid=7402 (Background constructions).
Regards, Franck.