USA 1918 group of 24c 'Jenny' flight covers (4) on leaves

USA 1918 group of 24c 'Jenny' flight covers (4) on leaves, the first example on 1c stationery card tied 'Air Mail Service Wash. N.Y. Phila May 16 1918' (the second day of the service), the second with additional 3c dated 'June 13 1918', then 'Jun 3 1918 First Trip' New York to Boston (signed) and 'Jun 9 1918 First Trip' Boston to New York. A fine & scarce group.

Estimate:£120

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