1935, 1k-50k, complete set of ten, fresh colors and nice centering, full OG (25k with minor gum disturbance at top), NH, VF and scarce in never hinged condition, Est. $1,000-$1,300 (Image)

1935, 1k-50k, complete set of ten, post office fresh quality unit, full OG, NH, VF and scarce in such state of preservation, Est. $1,500-$1,800 (Image)

1935, Mikhail Vodopyanov 25k indigo, one of two ''key'' values of the Chelyuskin Rescue set, used in 1938 on illustrated air mail registered cover from Pushkin (Leningrad Obl.) to Kaluga, together with two other commemorative stamps, appropriate markings and arrival ds on reverse, VF, Est. $250-$300 (Image)