Auction 90, Session 2 - Worldwide Rare Stamps and Postal History
Lot 838:
1940, Porteado (Porto) Portugal, 20c-2e, trial color imperforated proofs in various colors, group of ten blocks of four, printed on thin yellowish gray or white wove paper, no gum as issued, NH, VF, Est. $150-$200, Sc. #J56/63
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