12c Black (17). Position 51R1, huge margins all around incl. left sheet margin and significant part of adjoining stamp at right, bright shade, crisp impression, neat strike of grid cancel, tiny corner crease at bottom left far from design, which is why it was not mentioned on P.F. certificate, even if one millimeter of the left margin were trimmed to remove tiny corner crease it would still be an Extremely Fine Gem (XF-Superb 95 in our opinion), with 1984 P.F. certificate as sound and 2013 P.S.E. certificate (XF 90 Jumbo; SMQ $575.00 as 90, $1,175.00 as 95)

Image Magnifier / Download

PSE Population Report

Market data

Power Search for Comparables