Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Canada - 1928, Allegories of Flight, 5c brown olive, top sheet margin plate No.2 block of six, text on the edge reads: ''OTTAWA - No.A - 2 915 - A'', full OG, NH, VF, C.v. $250, Unitrade C.v. CAD$375, Est. $150-$200 , Scott #C1