Overprint on official stamps to transfer them to the category of regular postage stamps: "private" over the word "official", "0" over the "No." sign, a line covering the name and number of the district (school), and a new denomination of 1 kopek. Print run: 30 copies.
Official stamps were intended for official correspondence sent via the zemstvo post. Used in 1912-1914, issued free of charge, but accounted for. Emerald-green for six agronomic districts.