1924 10k on 5k green, wide "5" variety, l.h., v.f., cat. $1250 (Cat No. C7a) (Image)

Cat. $1250, Est.$750

1924 10k on 5r green, wide "5", canceled to order, v.f., cat. $700 (Cat No. C7a) (Image)

Cat. $700, Est.$250

1930 50k gray blue (error), l.h., fresh and fine, cat. $500 (Cat No. C23a) (Image)

Cat. $500, Est.$250

1931 North Pole Issue, perf. and imperf., l.h., fine-v.f., cat. $379 (Cat No. C26-33) (Image)

Cat. $379, Est.$150

1933 Stratosphere Balloon, 5k indigo, imperforate trial color proof on watermarked stamp paper, unused without gum, some facial rubbing, otherwise fine, with 1994 Rossica certificate (Cat No. C37P) (Image)

Est.$1,500

1934 Commercial Aviation, 10k green, horizontal pair imperf. between, used (double struck Leningrad cds), v.f., cat. $1250 (Cat No. C46a) (Image)

Cat. $1250, Est.$250

1935 Moscow-San Francisco 1r on 10k surcharge, used in 1935 on registered and flown cover from Moscow to Berlin, v.f., with arrival (23 Sep) pmk (Cat No. C68) (Image)

Est.$2,000

1949 1r red brown, bottom margin vertical pair imperf. between, h.r. at top, v.f. (a similar example realized $6,000 in our September 2011 sale) (Zagorsky 1367Pa, 200,000 RUB) (Cat No. C85var) (Image)

Est.$1,000

1955 North Pole overprint, 2r horizontal pair, se-tenant with right stamp missing dash variety, n.h., v.f. (Cat No. C96var) (Image)

Est.$200