1920, blank print (so called. "proof") the Pfennig stamps the Saar region issue (Michel -no. 32-40) on thin pressure paper, small paper wrinkle. These blank prints were upon completion the overpressure-phase at the inducement of Dr. Dub for inspection prepared, before the printing plates destroyed were. They are hardly known and only throughout few pieces into the trade come, expertized Burger BPP