Lot 322 Canada #MR2D 1915 50c black Admiral Overprinted WAR TAX in Red, a rare postally used block of four, with “Montreal Station N” duplex cancels dated MAR.18.1915. Accompanied by a 2015 Greene Foundation certificate. The first we have seen, ex. Lussey. Unitrade CV$320, sold for C$325.00 plus 15% buyer’s premium.