1923, Airmail 5k. deep-green wide "5", large margins all around, unused, without the usual gum creases, very fine and certainly one of the finest of the only 25 printed, signed Raybaudi with certificate and certificate Buchsbayew AIEP (2011) (Standard 011II)

1924, Flood damaged 3k. on 100r. orange, with very prominent and unusual variety "large part of the printing of the basic stamp missing on the lower left", unused, very fine and attractive

1924, Flood damaged 3k. on 100r. orange, with very prominent and unusual variety "overprint split at upper left", due to paper fold while overprinting, mint never hinged, fine and attractive

1924, Flood damaged 3k. on 100r. orange, vertical pair, the bottom stamp without surcharge, mint never hinged, very fine and rare, certificate Buchsbayew AIEP (2008)

1924, Flood damaged 3k. on 100r. orange, horizontal pair with inverted surcharge, mint never hinged, very fine, signed Goznak (Standard 63PPTa)

1924, Flood damaged 7k. on 200r. brown, with inverted surcharge, unused, very fine, signed Goznak, Mikulski a.o. and certificate Buchsbayew AIEP (2009) (Standard 64Ta)

1924, Flood damaged 7k. on 200r. brown, with inverted surcharge, mint never hinged, very fine, signed Goznak (Standard 64Ta)

1924, Flood damaged 12k. on 500r. blue, with clear double print, mint never hinged, very fine, scarce, certificate Dobin (2000) (Standard 65Tc)

1924, Flood damaged 12k. on 500r. blue, with clear double print, unused, very fine and scarce, signed Mikulski with copy of certificate (1986) and certificate Buchsbayew AIEP (2011) (Standard 65Tc)

1924, Flood damaged 12k. on 500r. blue, with inverted overprint, mint never hinged, very fine and scarce, signed and certificate Mandrovski (2008) (Standard 65Tb)

1924, Flood damaged 12k. on 500r. blue, with inverted overprint, mint never hinged, diagonal gum crease, scarce, signed and certificate Mandrovski (2005) (Standard 65Tb)

1924, Flood damaged 14k. on 500r. blue with black horizontal proof-overprint, showing full offset on reverse, unused, very fine, an extremely rare stamp with only very few known, signed Rosselevitch and Mikulski with copy of certificate and certificate Buchsbayew (2011) (Standard 265 variety, Liapine 168P1)

1924, Flood damaged 14k. on 300r. green, left marginal stamp on thin paper, mint never hinged, very fine and rare, certificate Mandrovski (2001) (Standard 66PP)

1924, Flood damaged 20k. on 1000r., vertical pair, the lower stamp without overprint, mint never hinged, top stamp small natural inclusion, very fine and rare, certificate Buchsbayew AIEP (2008)

1924, Airmail 10k. on 5k., topsheet margin pair, the upper stamp without surcharge, mint never hinged, tiny hinged remainder in the outer upper margin only, very fine, a great and attractive rarity of Soviet Airmail stamps, signed Mikulski (a.o.) with certificate (1988)

1924, Airmail 10k. on 5k., right sheet margin pair, the right stamp without surcharge, mint never hinged, very fine, a great and attractive rarity of Soviet Airmail stamps, signed A. Brun and opinion Kondrikov 

1924, Airmail 10k. on 5k. green with wide "5", fresh color from the upper right sheet margin, mint never hinged, usual gum creases, a very attractive copy, signed Goznak and certificate Sismondo (2003)

1924, Airmail 10k. on 5k. with inverted surcharge, fresh color and good margins all around, unused, a fine and attractive example of this rare stamp, signed Romeko, Kessler, A. Brun and Calves and certificate Buchsbayew AIEP (2007) (Standard 61TIa)

1924, Airmail 15k. on 1rbl. with inverted surcharge, from the lower left sheet corner, fresh color and good margins all around, mint never hinged, a fine and attractive example of this rare stamp, certificate Buchsbayew AIEP (2009) (Standard 61Ta)

1924, Airmail 15k. on 1rbl with inverted surcharge, fresh color and good margins all around, mint never hinged, a fine and attractive example of this rare stamp, certificate Mandrovski (2005) (Standard 61Ta)

1924, Airmail 15k. on 1rbl. with inverted surcharge, fresh color and good margins all around, unused, a fine and attractive example of this rare stamp, signed Mikulski (a.o) with certificate (1993) (Standard 61Ta)

1924, Airmail 20k. on 10rbl. with inverted surcharge, fresh color and good margins all around, unused, a fine and attractive example of this rare stamp, signed Mikulski and Dr. Jem (Standard T62a)

1926, Esperanto Congress 7-14 rbl., liner perforated 11½, fresh color and good perforation, 7k. one negligible short perf at left, mint never hinged, very fine, these perforation varieties were printed in sheetlets of ten and are among the rarest of pre-WWII Soviet Union issues, certificates Dobin and Mandrovski (2000, 2005) (Standard 151-152A)

1927, Esperanto 14k., four singles with different perforations, unused and mint never hinged, fine, one signed Buchsbayew

1927, Esperanto 14k., without watermark, line perforated 10, unused, very fine, certificate Buchsbayew AIEP (2011) (Standard 184B)