Although difficult to make out the
Werknummer this is almost certainly Wurmheller's Fw 190 A-5 WNr. 0314 (not an A-4 as indicated in the recent
Guideline Fw 190 Combat Colours monograph) displaying 80 victories during the summer of 1943 - including eight US stars on the victory
Balken. Wurmheller was
Kapitän of
9. Staffel at the time. Currently on offer here. Seller 'Mistelstein' also has some nice Richthofen Emils on offer so do check them out....
More on Wurmheller on this blog
here
http://www.ebay.de/itm/Orig-Top-Foto-Flugzeug-Fw-190-JG-2-Wurmheller-Abzeichen-Tarnung-Camo-/261186761084?pt=Militaria&hash=item3ccff1b17c#ht_481wt_1064
Fw 190 A-3 'Blue 13' of 10. (Jabo)/JG 2, probably seen at Caen during 1942