1919, United Russia 5 k. yellow imperforate, a single and a bloc of six, tied by cds “MARIUPOL EKATERIN. 2 7 19” to reverse of an envelope to Rostov on Don, sent underfranked at the previous tariff (new 70 kopek rate coming into force two days earlier), on front scarce postage due oval mark “DOPLATIT MARIUPOL", as 70 (k) due, reverse arrival cds, some minor imperfections, very scarce
