Auction 90, Session 1 - Worldwide Rare Stamps and Postal History
Lot 438:
1939, large die proof of 10c dark green, imprint ”Special Delivery” and ”X-G-673” at bottom, mounted on slightly enlarged card with protective paper overlay, proof size 106x85mm, no gum as produced, VF and very scarce, NSSC SD 9dp2, C.v. US$1,000, Est. $500-$750, Sc. #E7
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