Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1493:
1933 Holy Year issue, 25c+10c – 1.25L+25c, composite die proof in carmine, printed on thick white card, size 170x222mm, ”Institut de Gravure et D’Impression de Papiers-Valuer…” imprint at bottom, fresh, VF and extremely rare, only a few are known, Sassone #15-18, Est. $3,500-$4,000, Sc. #B1-4
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