Lot 147, Canada 1929 twelve cent grey Québec Bridge imperf pair, F-VF NH, sold for $253 July 24, 2020December 2, 2017 by Sparks Auctions Lot 147 Canada #156a 1929 12c grey Québec Bridge, Imperforate horizontal pair, mint never hinged, fresh and very fine. Unitrade CV$375, sold for C$220 plus buyer’s premium.