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msn 409
DHC-6 Twin Otter Series 300
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N981FL in FRONTIER colours at Calgary - CYYC, Alberta.
Photo:John Kimberley © November 1978 - Erik Johannesson Collection
N981FL at Calgary - CYYC, Alberta.
Photo: Anthony J. Hickey © October 1980 - Michael J. Ody Collection
N548N in those very distinctive colours, at Anchorage - PANC.
Photo: Unknown photographer © November 1982 - Erik Johannesson Collection
N148SA of SCENIC at Boulder.
Photo: Unknown photographer © December 2007 - Erik Johannesson Collection
N148SA at Grand Canyon - KGCN, Arizona.
Photo: Frank Jaeger © 13 May 2015 - Erik Johannesson Collection