5 WW1 related armbands for civilians collecting funds

[larsb001]

These armbands were in a local auction a week ago, and although I don't collect such items I found them rather attractive so they went my way. Seems to originate from an family of German decent, there were also a IC2 with document and a photo album from the inter war period etc in a few other lots.

 

It's obvious what they are issued for, it's printed on them, but I haven't seen similar armbands before, and a quick search on eBay and some of the larger German dealers didn't produce any results, so would others in here have similar items and any knowledge of how common they are?