Pof.SO3 Is, 5h blue-green imperforated, spiral type I (pos. 91, plate 2), wide margins, well centered Opt, sporadically occurring piece, sought by specialists, mint, exp. by Mrnak., Karasek + photo-certificate Karásek from y 2000, cat. 40000CZK In cat.: Philately / Czechoslovakia 1918-39 / Plebiscitary Zone SO 1920, U:A5
1920money letter sent 25.7.1920 from Slezská Ostrava to Velké Berezné - Carpathian Ruthenia, with Pof.SO20, SO21, SO22, arrival postmark on the reverse side, removed seal, else absolutely preserved In cat.: Philately / Czechoslovakia 1918-39 / Plebiscitary Zone SO 1920, U:A5
1920 PC CDV 14 uprated. stmp. Pof.SO3C, SO8A, SO27, sent 19.8.1920 from Slezská Ostrava to Germany, after validity stmp SO1920 (overprint) in time of tolerance, vert. fold, else preserved In cat.: Philately / Czechoslovakia 1918-39 / Plebiscitary Zone SO 1920, U:A5
1920 Reg letter sent 14.6.1920 from Slezská Ostrava to London, with Pof.SO1 2x (zoubk.), SO2, SO3 2x (zoubk.), SO4 (zoubk.), SO5 (zoubk.), SO6, SO11, sedmibarevná franking, arrival postmark on the reverse side, preserved In cat.: Philately / Czechoslovakia 1918-39 / Plebiscitary Zone SO 1920, U:A5
1920 official Reg letter sent unpaid 5.7.1920 from Moravská Ostrava to Dombrové, receiver paid postal-charge after/behind letter 30h, with Pof.SO35 Pr, envelope gently cut off, missing lapel In cat.: Philately / Czechoslovakia 1918-39 / Plebiscitary Zone SO 1920, U:A5
1920POLAND Austrian international post card 10h Crown with Opt Post Poland 15h sent to Czechoslovakia in time plebiscite with CDS CIESZYN 2/ 15.III.20, uprated by. postage stmp. 4x 3h, preserved In cat.: Philately / Czechoslovakia 1918-39 / Plebiscitary Zone SO 1920, U:A5