Sosnowiec, City Coat of Arms, 3- and 10-kopek stamps, 1916. Stamp without backing. Berbek Guarantee. Fi. 1.2 All items can be viewed at our office in Warsaw at 7/19 Romualda Mielczarskiego St., Mon–Fri, 8:30 a.m.–4:30 p.m. To facilitate the viewing, please contact us in advance by phone at: 691-666-727