Imperforate proof of the 10 rubles in dark blue and red for the 10 rubles with inscription Autonomous Siberia of the so-called Sazonov issue, very fine mint without gum. General Sazonov seized power in October 1922 and was leader of the last anti-Soviet government in Vladivostok. A set of 21 perforated stamps in similar designs was prepared. It is believed that only 1 set imperforate proofs, which was split up long ago, is in existence