Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1060:
1913, Tercentenary of the Romanov Dynasty, Nicholas I, imperforated large die proof of 15k in light blue, printed on chalk-surfaced thick paper, size 44x67mm, tiny traces of hinges, no defects, VF and rare, Est. $1,300-$1,600 , Sc. #95
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