The following site may be useful for those researching the various emblems on Luftwaffe aircraft. The number of old Coats of Arms is over 1,000, but this may be of use.
http://www.dr-bernhard-peter.de/Hera...ite53-sieb.htm
One link from the site illustrates what I mean:
https://books.google.de/books?id=3S0BAAAAQAAJ
Click on the middle image.
One more link:
https://familysearch.org/wiki/en/German_Heraldry
Ed