Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3
Lot 1459:
1918, black overprint on perforated 1r dark brown, pale brown and orange, vertical pair, top stamp has overprint type 4, bottom one – type 5, full OG, NH or LH (top stamp), expertized by J. Bulat, this se-tenant pair is not listed in the Cat., Est. $150-$200, Bulat #1164- 1202
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