Oberleutnant Wilhelm Hasselbach?? Information?

Hi,

Just joined today. Cool site. I am interested in finding out if anyone knows of a Luftwaffe Oberleutnant by the name of Wilhelm Hasselbach. I have come across some effects with his name on them and cannot find anything on the net about him. If anyone can point me in the right direction, I'd be very greatful.

Regards

Jamey
Perth, Australia.