What an interesting record, and what a slice of history!
I just ran a Google translation on the Lorelei side's inscription; I think a fair reading of what came up would be that the record was for the benefit of German and Austrian soldiers blinded in combat. (Remember, leaving aside those who might have taken head injuries from bullets or shrapnel, one of the many lovely effects of gas warfare was blinding its victims.) That would comport with the picture of a man of military bearing holding a white cane and being guided by a little girl, probably intended to represent his daughter. My own "record jacket German" is just good enough that without resorting to computerized assistance I agree the other side states it is to benefit the German and Austrian Red Cross organizations.
Very nice transfer, and your video skills are a "wow." I didn't catch whether you referenced this, but in case not, the Brooklyn Saengerbund went back even further than the Mannerchor on the other side; this article from 1912 indicates the group was about to celebrate its 50th anniversary:
https://www.newspapers.com/clip/1000131 ... engerbund/ Apologies if I missed it in the video somewhere--I was busy marveling at how well it was put together!