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Ten First Rotary Helicopter Flight Covers [135486]

Currency:USD Category:Stamps / United States - Covers Start Price:50.00 USD Estimated At:100.00 - 300.00 USD
Ten First Rotary Helicopter Flight Covers  [135486]
SOLD
75.00USD+ (18.75) buyer's premium + applicable fees & taxes.
This item SOLD at 2021 May 17 @ 13:08UTC-7 : PDT/MST
SHIPPING & HANDLING: Shipping is subject to a minimum charge of $19.00. Shipping and handling cannot be estimated prior to invoicing as it is based on the size and weight of your purchase. Additional shipping and handling costs, if required, will be re-invoiced for the balance due. Items are not shipped until the invoice is completely paid. Many buyers purchase a number of lots. Every effort will be made to include all lots in a single shipping charge calculated to cover the weight and size.SHIPPING & HANDLING: Shipping and Handling cannot be estimated prior to invoicing, based on the size a...
Ten canceled and unopened covers celebrate the first U.S. Air Mail delivery by helicopter. In 1939, Eastern Airlines flew the KD-1 Autogiro to deliver mail five times daily from Philadelphia's 30th Street Post Office to the Camden, New Jersey, Central Airport. Nine of the ten covers commemorate that route. The first successful Autogiro was created by Juan de la Cierva, and flew in January 1923. W. Wallace Kellett was the president of the Aero Club of Pennsylvania 1923-25. In 1929 he founded the Kellett Autogiro Corporation with his brother Rodney and Charles Townsend Ludington and his brother Nicholas. They licensed and further developed the seminal designs of Harold Frederick Pitcairn and Juan de la Cierva. Kellett started a campaign in Washington D.C. to get a government contract to carry mail for short distances after his KD-1B autogiro proved its airworthiness in 1935. A demonstration of mail delivery was made at the Capital in early of 1938 to get congressional approval for funding. It was decided to carry mail using an autogiro on an experimental basis.

Date: 1939
Country (if not USA):
State: Pennsylvania
City: Philadelphia
Provenance: