Tonga 1923-4 2d on 10d black and lake varieties, SG66/b/cTonga 1923 24 2d on 10d black and lake, type 27 surcharge in blue, watermark upright (inverted), block of 4, positions 6 7 16 17 on the sheet, showing the two pantograph varieties "Both O's small" (position 7) and "Small second O" (position 17) se tenant, SG66 b c. A fine mint block with large part original gum. Characteristic minor blemishes (position 7 with small gum thin), but, overall, fine and fresh appearance. An extremely scarce philatelic item