Overprint on official stamps to convert them into 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: 300 copies.
Official stamps were intended for official correspondence sent via the Zemstvo post. Used in 1912β1914, issued free of charge but accounted for. Emerald green for 6 agronomic districts.