So I recently acquired a new piece of German Notgeld, 1917 Bertrich 5 Pfennig Zinc
My Lamb book (1960's) lists value at .50, which would put it as a rather common piece... However, my Menzel book lists it's current value at 180 Euros!
I have been able to find some auction records for the 10pf, but none for the 5 nor 50 Pf...
Any ideas?