Hello Johannes,
Most interesting data, thank you very much for sharing this with us. Regarding the Luftbeob.Staffeln your data sounds convincing and in line with data I have assembled for Luftbeob.St.1 and 3, both established in Venlo late 1943.
Lt. Ludwig Wirtz (not Wurtz
) flew from 'my' airfield Venlo late 1943 and early 1944 before his fatal accident 8th January 1944.
Keep up the good work! Best regards, Marcel