Ping Gordon: Jagdgruppe 50 question

I was reading Martin Middlebrooke's book on the
Regensburg-Schweinfurt raid, and in it there's a photo of a
group of Luftwaffe pilots sitting around a table playing
cards. The caption says they're members of JagdGruppe 50,
and the photo was taken at Wiesbaden. The guy almost
directly facing the camera is an Oberfeldwebel with a tin
tie. Any idea who he might be, assuming the photo was taken
about the time of the raid (August 17th, 1943)? ISTR that
NCO fighter pilots with Ritterkreuz were pretty rare in the
western JGs (off hand, Addi Glunz is the only one who comes
to mind), so I'm guessing he probably won it in the east.

TIA,

Guy