I know that the regulations authorized the triangle in September of 1941, and there is some information in Wim's book, but I think this is an extremely rare triangle. There are not any illustrations or photos in the book, and I have never seen one in a collection personally.
I have just bought an HJ photo album and there are some very odd uniforms etc shown from what I believe is an early school of some sort. The pics are small and very hard to enlarge . There are leaders with white hat bands and epaulettes and one guy with an off triangle which might be of interest here. Will try some scans and post later
no not dated but everything is obviously from the 30s. Wish someone could view this album as there are some other very early school pics with Luftwaffe connections.