CEYLON 1921 SG351aw Mint 25c orange-yellow and blue Script wmk inverted

1921-32 25c orange-yellow and blue, die I, Script wmk, variety WMK INVERTED, lower left corner block of 4 from an upper left pane, very fine unmounted o.g. A very scarce and desirable block, with the wmk variety easily visible in the margins from the face. - P201004121