U.S. & Worldwide Stamps & Postal History; The David Mace Collection of U.S. Stamps
April 24-25, 2018
| Images | Description | Current Bid |
 | Lot #1584 RUSSIA Air Post 1933 Balloon, 5k ultramarine, horizontal pair, imperf. between, cancelled "Leningrad 1933", v.f., extremely rare, with 1988 Mikulski certificate (Zagorsky 341Pb) O Catalog #C37b | Price Realized $1,400.00 |
 | Lot #1585 RUSSIA Air Post 1935 1r on 10k dark brown (Levanevsky), Moscow-San Francisco, red overprint and surcharge inverted, n.h., perfect centering, natural gum wrinkles, signed Brun and Dr.P.Jemchouchin, v.f. A rarity - only two sheets (50 stamps) of the inverted surcharge were printed, ** Catalog #C68a Catalog Value $150,000 | Unsold |
