“MOGILNICA WAR(SAWA). 20 OCTOBER 1877” two-line cancellation on 1866 1 k. black/yellow, 3 k. black/green vertical pair and 1875 8 k. grey/carmine-rose as additional franking to registered 8 k. grey postal stationery envelope with arrival cds. “KOVEL 23 OCT. 1877” alongside, very fine and very scarce, certificate Mikulski (1994)
