Air Mail cover 1917 (April - July) Army Airplane Exhibition, a well presented collection of cards, covers and others, bearing various "Turul" , War Charity or Harvester values, cancelled by the special Exhibition postmark (including illustrated first day card), the cards depict various historical or propaganda subjects, a few carried by the post or possibly flown. (17 items)
Air Mail cover 1917 (April - July) Army Airplane Exhibition, a well presented collection of cards, covers and others, bearing various "Turul" , War Charity or Harvester values, cancelled by the special Exhibition postmark (including illustrated first day card), the cards depict various historical or propaganda subjects, a few carried by the post or possibly flown. (17 items)
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