Dissolution of my own quality collection "Bizone Band / Netz imprints on No. 36 - 51" in top quality! I have always attached great importance to absolutely perfect preservation! Here the upper margin collection stamped with mesh overprint. The no. 45 W OR is deeply signed Schlegel BPP and the upper margin no. 48 Pdgz on the cover has the rare overprint error AF O I "second mouthpiece" (Michel + € 300) The upper margins have never been checked in terms of color. 41 Pdgz could be b-color and 38 P + W ?? All upper edges are not pre-creased and not separated! The total catalog value according to MICHEL 2021 is 2700, - €. Only the simple upper margin evaluation, without the corner margin surcharge etc., was calculated! I give a guarantee of authenticity and inspection on all pieces in the collection!