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Canada #CL27i. VF mint Never Hinged Patricia Airways and Exploration Company, semi-official airmail issue with the double-overprint "Special Air Service, Sioux Lookout and Red Lake District, 5 cents" and " Haileybury and Rouyn, 10 cents" CL27 issue, but also being the "violet plane" Unitrade listed variety / sub type (quite easy to see if set beside a regular "red plane" example). An uncommon semi-official airmail stamp to find and the first we have handled. Pristine condition. 2024 Unitrade =
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