More JG 300 rarities on offer again from sammel-experte06 here
I've seen this labelled as Lt. Erwin Stahlberg, Staffelkapitän 1./JG 300 - it's not unfortunately. Photo dates from summer 1944, Bad Wörishofen, southern Germany
General der Jagflieger Galland on an inspection visit to I./JG 300 at Borkheide during October 1944. Here he is looking over Gruppenkommandeur Stamp's G-10. More on I./ JG 300 at Borkheide on this blog here
http://www.ebay.de/sch/richlint-2011/m.html?item=311072953281&rt=nc&_trksid=p2047675.l2562
on offer here