1920, 20k. on 14k. cobalt/red tied by cds. "VLADIVOSTOK 28 10 21" to registered cover with Russian and French r-label to Miloslaw, Poland with adjacent polish censor mark "P10" of Posen, London transit and "MILOSLAW 16.12.21" arrival mark, horizontal fold and some light transport wear, a very rare and with polish censor mark probably unique cover, certificate Mikulski (2005) and Drzewiecki (2017)