Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1201:
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
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