Bidspirit auction | Canada - Official Stamps

Canada - Official Stamps - 1949, Logging, 50c green, black O.H.M.S. overprint, three-side margin block of ten (5x2, bottom part of a sheet), plate No. 1 at bottom right corner, full OG, NH, VF, Unitrade #O9, C.v. CAD$4,380 as plate block and six singles, Est. $1,200-$1,500, Scott #O9