Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3

Soviet Union Stamps of 1924-40

The auction will start in __ days and __ hours

Start price: $2,500

Buyer's premium:

1927, Dr. Zamenhof, Creator of Esperanto, 14k bright green and brown, right sheet margin imperforated block of four with beautiful margins at three other sides, excellent quality, full OG, NH, VF and rare multiple, C.v. $5,500 as singles, Est. $4,000-$5,000, Sc. #374c