Thanks Peter, fore your precisions.
In the mean time, Peter from LEMB surmizes the unit as being 2./KüFl.Gr 306 or 2./KüFl.Gr.406 according to this well known unit emblem:
http://cgi.ebay.de/098-Orig-Foto-Flu...item1e5c498974
You'll find both his thread and the one started by Clint here:
http://www.luftwaffe-experten.org/fo...howtopic=10637
http://www.luftwaffe-experten.org/fo...=0&#entry57958
Cheers
Marc