upper right stamp in mint block of four (positions 47-48, 57-58), red brown overprint, stage V (14.Bb), additionally position 47 with "8" in Type B (14.12), very fine, the "Zone" in antique type is rarer with red brown overprint than carmine with just 10 examples produced, a wonderful multiple, 1992 Philatelic Foundation certificate (Scott $1,855 as singles)