Hier noch mal eine Webpage
http://www.cameraquest.com/luft.htm

und seht was dort steht
Unscrupulous sellers regularly buy plain wartime vintage IIIC's, probably to engrave them with Luftwaffe or other military engravings. Before you waste your money on a real Leica with fake Luftwaffe engravings, check with Leica to make sure that camera was delivered to the military.
wo sogar echte Leicas zum Luftwaffenfake werden.
Pierre