1 Rbl. on 10 Kopecks plus 10 Kopecks postal stationery postcard, the postage stamp impression of the "answer part" and the official added 10 Kopecks stamp have a joint! authentic overprint, unused, very fine, photo expertize Walter Zirath BPP (2011) "due to the low issue are these postal stationery postcards extremely rare. at the moment is only these card known. this is a unique piece. ", Michel .