Auction 90, Session 1 - Worldwide Rare Stamps and Postal History
Lot 439:
1938, large die proof of 20c dark carmine, imprint ”Special Delivery” and ”X-G-673” at bottom, mounted on slightly enlarged card with protective paper at top, proof size 107x85mm, no gum as produced, VF and rare, NSSC SD 7dp2, C.v. US$2,000, Est. $900-$1,200, Sc. #E8
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