CANADÁ 301a CARTA, 17.8.1937, primer vuelo HERB LAKE-THE PAS, carta magnífica, Müller 30

17.8.1937, Erstflug HERB LAKE-THE PAS, Prachtbrief, Müller 301a. 17.8.1937, first flight SHARP SHEET-THE PAS, superb cover, Müller 301 a.

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