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postage

1993, Nov 6 Vertical Take-off Aircraft unwmk (no perf info) (6 stamps)

-	150r	multi	First Helicopter Model, France, 1784		.20
-	200r	multi	Model of Steam Helicopter, 1863		.20
-	250r	multi	New York-Atlanta-Miami Autogyro Flight		.20
-	500r	multi	Sikorsky Helicopter, 1943		.20
-	900r	multi	French Vertical Take-off Jet
-	1000r	multi	Juan de la Clerva's C.4, 1923

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