CANADA, 1928, 25c Blue, Klondike Airways, Air Post Semi-Official (CL45).
Tied by White Horse, Yukon Nov. 21, 1929 circular datestamp, along with 2c Green (No. 150) on flown cover to Champagne (Dec. 19 backstamp), additional Champagne datestamp of Jan. 3, 1930 on front, signed by pilot Norman Jeffries, Very Fine, genuine flight covers with this stamp are very scarce and demand a significant premium over "souvenir" covers
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