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Postal treaty with the order of the Knights Hospitallers (the knights of Malta).
3271
Coat of arms of the order of the Knights Hospitallers
This is a joint issue with Malta. Click here to compare the Polish stamp with the Malta stamp
Umowa pocztowa między ministrem łączności RP (Rzeczpospolitej Polskiej) a suwerennym rycerskim zakonem Maltańskim = Postal treaty between the minister of communication of the Republic of Poland and the sovereign knight's order of Malta.