Air Post Official stamps. 1922, red surcharge 600m on Consular stamp of 3r black green on rose and green network, vertical pair of types I and II from positions 6 and 11 of 25-stamp setting, full OG, top stamp is hinged, bottom one - NH, VF and scarce in pair, expertized by Z. Mikulski, C.v. $700 as singles, Est. $400-$500 (Image)

Air Post Official stamps. 1922, red surcharge 1200m on Consular stamp of 2.25r dark blue on green and buff network, position 6 of 25- stamp setting, full OG, NH, VF, A. Diena and Soviet Philatelic guarantees, C.v. $2,200, Est. $800-$1,200 (Image)