“Day 30: This is a 4 note set issued in 1921 by Shierke im Harz.
The denominations included in the set are 10 Pf, 25 Pf, 50 Pf, and 75 Pf.
The catalog value for this complete set is around $8. There are also very scarce versions of this set that include a round stamp on each note. The set of all 4 notes with the stamp are worth around $300.”