Hong Kong 1921-37 2c blue-green, variety watermark inverted, SG118bwHong Kong 1921 37 2c blue green, Script watermark, printing variety with inverted watermark, SG118bw. A fine unmounted mint with original gum (hinged in margin only) upper right corner block of 4 showing plate number "1" and "Q27121" requisition number, from the 1922 printing. Despite slight toning, as to be expected, it is still fine and of striking appearance. Most appealing is the fact the watermark is clearly visible from the face. A very rare and