center stamp in mint block of nine (positions 15-17, 25-27, 35-37), red brown overprint, stage V (14.Bb), other varieties include position 27 with second and third "As" defective in left "Panama" (14.7), position 25 with third "A" short at top in left "Panama" (14.9), position 27 with "N" with thick left stroke in (right) "Panama" (14.10, should be position 26 but overprint is shifted), position 35 with "8" in Type B (14.12), positions 16, 26, and 36 with one "Panama" (14.14), and positions 17, 27, and 37 with two "Panamas" close together (14.15), very fine, a spectacular block, only 10 examples of "Canal" in antique type were produced with the red brown overprint, the other varieties make this a truly interesting and scarce item, 1969 APEX certificate (Scott $2,030 for 14d plus eight normal singles)