Hi Jean Francois,
no, unfortunately I hadn't much time. The Nicolaisen books contain 2500 pages

.
It wasn't a rare decoration. They had to take part in bringing down a confirmed number of enemy aircrafts.
It was said the confirmation had been the harder part.
Sometimes the Flakhelfer only got the certificate of award because the badges were out.. I remember one case: The father of one chap was working as a dentist, they borrowed one badge from a comrade, the father did a plaster cast - and all of them got nice badges of lead.
Hello Wim,
great to have you here in this thread.
I can't answer Jean Francois' question about the number of awardings of the Flakkampfabzeichen. I doubt if there are concrete numbers. Do you have further information?
Every (school) class of Flakhelfer had to form a Schar. The highest HJ leader of them should take over as Manschaftsführer, responsible for internal and HJ service.
Are there more classes, so they form one by one several Scharen, and the highest HJ leader takes over this Gefolgschaft as Mannschaftsführer (RJF, 19 Jan 1943, Der Hitler-Jugend-Dienst der Luftwaffenhelfer, Entwurf, quoted from Nicolaisen, Einsatz, p231ff). But this Mannschaftsführer as the speaker of his classmates never played an important role on them nor had a command as intended by the RJF (Nicolaisen, p192).
The attempt of introducing the HJ lanyards instead of the pip was one of the increasingly desperate RJF list of measures to gain more influence on the Flakhelfer who considered themselves as soldiers, not as "little boys" and refused HJ service very often.
These conflicts intensified after the additional conscription of apprentices as Flakhelfer in August 1944.
BTW: There was another cord allowed to wear: A (usually twisted) silver (or white) cord meant Offiziersbewerber (officer candidate).