20 Pfg label, blue, type I being a franking on legitimate cover with cancellation "ALTENTREPTOW a 23. 7. 45", the cover was with high probability in Wildberg mailed and therefore being a long distance cover franked, Wildberg had a Postal service place (II) - the post office Altentreptow shelter, cover with some defects and mould spots, detailed certificate with photograph Dr. Arenz BPP - rare!