1937 souvenir sheet used and unused (n.h.), minor wrinkles, v.f., cat. $390 (Cat No. C75a) (Image)

Cat. $390, Est.$150

1944 Stratosphere Disaster set of three, used on registered 3.3.44 cover from Moscow to USA, opened by censor, with seal and additional military censor handstamp on back, New York May 24, 44 arrival pmk, fine and scarce war-time usage (Cat No. C77-79) (Image)

Est.$250

1944 "Memorial to the Soviet Balloonists who on 30th January reached the height of 22,000 meters", 50k green (Vasenko), 50k ultramarine (Fedosenko) and 50k gray green (Usyskin), imperforate trial color essays in unissued colors and denominations, each mounted on card, with handwritten technical inscriptions, value with penciled line and official handstamp and signatures on back, archival punches through last two, with 2019 Liapine certificates (Cat No. C77-79P) (Image)

Est.$15,000