Here's my take on these patches just to add to the pool of info.
There are three periods which I think affect the configuration of these pre-Oberbann DJ rune patches:
27th of March 1931 to 1st of May 1931
1st of May 1931 to May 1932
May 1932 to July 1933
The first period starts with the incorporation of the Deutsches Jungvolk into the Hitler Youth and ends with Hitler's decision to place the Hitler Youth under SA control.
The second period is the Hitler Youth under SA control.
The third period sees the Hitler Youth becoming a seperate organisation away from SA control and culminates in the major reorganisation of the structure.
I haven't seen any evidence that the Jungvolk wore rune patch insignia prior to becoming part of the Hitler Youth on 27/1/31 so these patches are more likely to be from after this date. The first period covers only 36 days anyway and as I'm unaware of any regulation stating that there was DJ shirt insignia from the beginning in March 1931 I'm left with the more likely scenario in period two with SA colours being used. From May 1931 new 'HJ-Gruppen' were formed to incorporate HJ formations into the SA and it seems logical to me that HJ and DJ units within a particular
HJ-Gruppe would wear the same colours as their respective parent SA formations and that's how I see these patches.
The period covering the incorporation of the DJ into the HJ up to the major reorganisation and regulations on uniforms and insignia in 1933 was full of change including a change of leader from Gruber to von Renteln and ultimately of course to von Schirach. Hartmann Lauterbacher the then Gauführer of Braunschweig was charged with a major reorganisation of the HJ structure in the easter of 1932 and the new terms '
Gebiet', 'Bann' and 'Unterbann' were introduced during the period too so the whole thing was fluid which I think goes a long way to explain why it is so difficult to nail this one by relying on regulations.