6 Pfg numeral, l black yellow green, with official only vertical line rouletted 13 of the Regional Directorate of Posts Dresden, horizontal without roulette and with additional nachträglichen roulette from post office Loschwitz, used "Dresden-Loschwitz -c . . . 45. -18", certificate with photograph Ströh BPP (2012) : "genuine and immaculate. . . Cancelled stamps in this roulette variety are very rare. "