I did some researching on the 1920's pre war Notgeld Adler, and yes there are literally hundreds of collectors wishing to pay some extremely high prices to find the most little known German village paper currincies. I can't see it for the life of me, but due I suppose to the originality of the item it is indeed a work of art. have you thought about puitting those in some sort of proteective binder ?
We all collect in our own ways....
E ♫