Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1
Lot 160:
Description
1975, Liberty Bell, 13c brown, booklet stamp in irregular block of ten, vertical pair imperforate between stamps on the right, additional incomplete pair at left, these error caused by a foldover (fold at the bottom left of the pair), full OG, NH, VF, only a few such errors exists, APEX certificate, C.v. $1,500, Est. $600-$800, Scott #1595a
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