Lot 321 — Canada #MR2B used on cover, sold for $345 July 24, 2020August 4, 2011 by Sparks Auctions 1915 5c blue overprint War Tax, on an attractive First Flight cover with Montreal DE.19.1929 cds. A well-centered very fine stamp. Unitrade CV$250 is for used stamp only. Realized $345.