Lot 42133 – 1909, National Exposition, complete set of nine ABN

1909, National Exposition, complete set of nine ABN stamp-size cut die proofs in black affixed to cards with margin below showing ABN imprint and die number, and die proof of the frame used for the vertical designs marked « Original » at top; in addition the same set of proofs but displaying the die number crossed out in margin and replaced by larger five-figure numbers, 20 items in total, very rare.