Lot 2050
 
1911 (Oct. 4-8) Hydro-Aeroplane Flight, St. Louis, Mo., 1¢ green tied on PPC by Oct 7 flight cancel (the flight didn't actually take place until Oct 8), VF and rare, only 15 covers were flown; card shows pilots and event organizers on the ground with biplane behind them. AAMC 5d $500.
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| Realized $230 |
