unused Block of Four -- 20c. on 16c. surcharged in Kiangsi, a marginal block of four from the right of the sheet, upper right showing "Gai" for "Tso" character, lower right showing "Tso" for "Gai". Small tone spots to reverse, though with full original gum. Both varieties with H.L.Chung guarantees. Chan 713/a/b, $300+