“Day 52: This is a 7 note set issued in 1921 by the city of Altenburg. Each of the 7 notes in this set have a denomination of 50 Pf.
The designs featured on these notes represent a German card game called 'Skat'. In addition to the notes, I've also included the original envelope these notes were issued in (last 2 images in the slideshow).
The catalog value for this complete set of 7 notes is around $25. The value of the envelope is around $15. Here you can find more info about this set and others.”