1932 2m 'Mongolian Revolution', Mongolia (Mi. 47, Project in Green, 20 March 1932, Proof) (Image)

1932 10m 'Mongolian Revolution', Mongolia (Mi. 49, Project in Green, 20 March 1932, Proof) (Image)

1932 20m 'Mongolian Revolution', Mongolia (Mi. 51, Project in Brown, 8 March 1932, Proof) (Image)

1932 20m 'Mongolian Revolution', Mongolia (Mi. 51, Project in Lilac, 8 March 1932, Proof) (Image)

1932 20m 'Mongolian Revolution', Mongolia (Mi. 51, Project in Red, 20 March 1932, Proof) (Image)

1932 1t 'Mongolian Revolution', Mongolia (Mi. 55, Project in Green, 20 March 1932, Proof) (Image)

1932 1t 'Mongolian Revolution', Mongolia (Mi. 55, Project in Red, 20 March 1932, Proof) (Image)

1929 10C China (Canceled, Signed, CV $ 60) (Image)

1926 Mongolia (Violet Overprints, Sc. 16 - 20) (Image)

1926 $1 Mongolia (Violet Overprint, Sc. 22) (Image)

1926 $5 Mongolia (Violet Overprint, Sc. 23) (Image)

1926 Mongolia (Black Overprints, Sc. 16a - 20a) (Image)

1926 50c Mongolia (Black Overprint, Sc. 21a) (Image)

1926 1d Mongolia (Black Overprint, Sc. 22a) (Image)

1926 5d Mongolia (Black Overprint, Sc. 23a) (Image)

1926 1c Mongolia (Proof, Red Overprint, Sc. 16b, Signed, MNH) (Image)

1926 2c Mongolia (Proof, Red Overprint, Sc. 17b, Signed) (Image)

1926 5c Mongolia (Proof, Red Overprint, Sc. 18b) (Image)

1926 10c Mongolia (Proof, Red Overprint, Sc. 19b, MNH) (Image)

1926 20c Mongolia (Proof, Red Overprint, Sc. 20b, Signed) (Image)

1926 50c Mongolia (Proof, Red Overprint) (Image)

1926 1d Mongolia (Proof, Red Overprint) (Image)

1932 Mongolia (Sc. 62 - 74, Full Set, CV $90) (Image)

1932 Mongolia, Blocks of Four (Sc. 65, 67, CV $90) (Image)

1932 1t Mongolia (Yellow-Green Proof / Variety, Sc. 71) (Image)