BELOSTOK (Poland): 10 kopeck brown and blue, good to large margins, used on lettersheet with reverse side dispatch mark"BIALYSTOK 8 AUG.1858", to Warzaw; the stamp cancelled upon arrival twice by red c.d.s. "WARRSZAWA 21/8). Usual filing fold, not affecting the stamps. A fine and very rare entire; just few No.1-entires have been recorded from todays Polish soil. Certificate Buchsbayew 2014)
