Hello All,
The IDENTICAL shape of the 'three moon' motif is found in a German city coat-of-arms of the renaissance period. In this city coat-of-arms that contains three moons arranged in a triangle, the shape of the moons is IDENTICAL to that etched on the blade of the katzbalger. I have to review the 15,000 German city coat-of-arms to refind it one more time (Siebmacher, year 1605; link
http://www.wappenbuch.com/) !
At the moment, I have reviewed only about a thousand of coat-of-arms

!
Hope this helps,
jm