Public Auction 56 / Philately / Czechoslovakia 1918-1939 / Economics and Science 1920
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Public Auction 56 / Philately / Czechoslovakia 1918-1939 / Economics and Science 1920 - Information
17.6. 1920 Hospodářství a věda
Na základě výzvy Ministerstva pošt a telegrafů předložil prof. Jakub Obrovský návrh na poštovní známky emise Hospodářství a věda. Autor předpokládal, že známky budou vytištěny hlubotiskem, nakonec byly provedeny knihtiskem z galvan. Známky opět vytiskla tiskárna České grafické Unie v Praze. Dne 17.6.1920 byly vydány hodnoty 100 a 200 haléřů, hodnoty 300 a 400 haléřů 23.6.1920. Po zvýšení poštovních poplatků dnem 1.8.1920 vyšly 24.8.1920 další 2 hodnoty, 500 a 600 haléřů, vytištěné knihtiskem z leptaných desek. Od každé ze 6 různých hodnot byly vyrobeny 2 tiskové desky (TD) a sestaveny vždy pod sebe a spolu s další dvoudeskou jiné hodnoty byla vytvořena 4-desková tisková forma (TF). Ve třech TF byly hodnoty: 100+200, 300+400 a 500+600 haléřů. Poštovní známky všech hodnot bílý hladký, nebo mírně nažloutlý či našedlý papír, lep je bezbarvý, bílý nebo nepatrně nažloutlý. Všechny hodnoty byly opatřeny řádkovým zoubkováním ŘZ 13¾, hodnoty 300, 500 a 600 haléřů s hřebenovým zoubkováním HZ 13¾:13½ jsou mnohem vzácnější, u neupotřebených poštovních známek 500 a 600 haléřů se perforace HZ 13¾:13½ vyskytuje vzácně. Známky byly vytištěny ve značných nákladech, řádově nižší desítky miliónů kusů a nebyly v době platnosti spotřebovány. Hodnoty 100 a 200 haléřů platily do 30.4.1921, platnost zbývajících 4 hodnot skončila 30.1.1923.
V roce 1922 byly hodnoty 100, 200 a 400h použity pro přetisk na letecké známky II. vydání a zbylé zásoby všech 6 hodnot byly využity pro přetisk doplatních provizorií.