USA Underpaid Aerogramme: Attempted Cross-border Collection of Postage Due

 

USA 15c aerogramme posted at Fort Fairfield, Maine, in the United States by a sender who lived just across the Canadian border in Perth, New Brunswick, in July 1974. Since the aerogramme rate was 18c, the item got a slip of paper attached reminding the sender to re-post the aerogramme with the missing 3c paid.

As no sign of payment of the missing postage is visible, the attempt most likely had failed.

As the rate indication is "per half ounce" the hectographed slip of paper was prepared for air mail letters, not for aerogrammes.