Hauptmann Helbig portrait with signature

Hauptmann Helbig portrait with signature. War time postcard portrait with war time signature of Joachim Helbig, knights cross holder with oak leaves and swords. The post card with signature was send to a member of Lehr geschwader 1 Feldpostnumber 37399. Good wartime signature with history of the collector who collected multiple postcards with signatures form LW aces.
https://en.wikipedia.org/wiki/Joachim_Helbig