Bidspirit auction | Canada - Officially Sealed stamps

Canada - Officially Sealed stamps - 1913, Dead Letter Office, no value indicated in brown black, top sheet margin horizontal pair, plate No. 1 imprint at the top edge, full OG, NH (hinged on margin away from the stamp), VF, Unitrade C.v. CAD$1,200 as two stamps, Est. $500-$600, Scott #OX4