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: $1,000

Buyer's premium:

1939, Agriculture Exhibition, 1r blue, comb perforation 12×12½, raster vertical diamonds, neatly cancelled at top right corner, fine and extremely rare raster and perforation variety, which is known only in used condition, just a few stamps recorded, Est. $1,500-$2,000, Sc. #733 var