1912-24 Watermark Royal Cypher 1½d. chocolate-brown No watermark, S.G.N18(5)a,

vertical marginal block of 6 from the upper left corner of the sheet, the watermark shifted to the right resulting in the lower left stamp the No watermark variety  and the above vertical pair sharing the 'AGE' of 'POSTAGE' watermark, unmounted original gum.