CEYLON 1918-19 'WAR STAMP' 1c on 5c purple, variety, SG335yCeylon 1918 19 'WAR STAMP' 1c on 5c purple, variety watermark inverted and reversed, block of 4 from upper right corner of lower right pane with part interpane margin above, SG335y. A very fine mint positional block of four with original gum (all stamps unmounted mint). A very scarce positional piece, pleasing with the variety visible in the right margin from the face. Stanley Gibbons catalogue value: 480+. The War Tax stamps included a 1 cent postal