Here are 2 very nice and uncommon wertbestaendige notgeld from Bielefeld, that have been cancelled ('Ungultig')! Collectors may have come across similar pieces, but these are the only ones I have ever seen that have been cancelled. Bielefeld issued these small-sized pieces in paper and also linen.
(mouse-over the image to see the fronts!)
The brown note has a face-value of 1 goldpfennige and the red one is for 10 goldpfennig..........often abbreviated to 'Gpf'. The imagery on the notes is very interesting, depicting in the center, a man with 4 birds feeding from his mouth.