Air Mail cover 1919 (9 June) Handley-Page attempt envelope to Liverpool, bearing $1 on 15c. with St. John's machine d.s. and showing Harbour Grace c.d.s. for 14 June alongside. Photo

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Air Mail cover 1919 (9 June) Handley-Page attempt envelope to Liverpool, bearing $1 on 15c. with St. John's machine d.s. and showing Harbour Grace c.d.s. for 14 June alongside. Photo