JG3 I think is the place you need to start.
Black 8' from 2./JG 3
The emblem is a Tatzelwurm.
Taken form a post of Osrams over at SimHQ:
A JG (JagdGeschwader) is subdivided into three Gruppe s named I and II and III. Each contains 3 staffels but they are counted sequentially, IOW
I. Gruppe contains 1,2,3
II. Gruppe contains 4,5,6
III. Gruppe contains 7,8,9