Bidspirit auction | Worldwide Air Post Stamps and
Worldwide Air Post Stamps and Postal History - Canada - 1938, Airplane over Mackenzie River, 6c blue, horizontal imperforate pair, full OG, NH, VF, C.v. $850, Unitrade C.v. CAD$1,200,Scott #C6a
Worldwide Air Post Stamps and Postal History - Canada - 1938, Airplane over Mackenzie River, 6c blue, horizontal imperforate pair, full OG, NH, VF, C.v. $850, Unitrade C.v. CAD$1,200,Scott #C6a