Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Canada - 1928, Allegory of Flight, 5c brown olive, top right corner sheet margin plate OTTAWA No.A-1. 91 5-A block of eight (4x2) imperforate vertically, gum overflow at left, still full OG, NH, VF and rare multiple, Unitrade C.v. CAD $3,225++, Scott #C1b