Lot 1876
 
$1.30 and $2.60 Graf Zeppelins (C14-C15), tied by New York duplex cancels (7 May) on dual-cacheted Zeppelin cover flown Friedrichshafen - Friedrichshafen with purple round-trip cachet, backstamped Friedrichshafen (6 June), Very Fine. Michel 68Gc.
Estimate 500 - 750
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| Realized $550 |
