1898 1c - 50k Set of sixteen distributed by the U.P.U as Specimen stamps (without any Specimen overprint), handstamped upon arrival with diagonal "SPECIMEN" (believed to be applied by the British Post Office) and applied to an archive page, subsequently soaked off and therefore all without gum, the 2k, 3k and 10k a little stained but a unique set. S.G. 116/131. (16). Photo on Page 150. (Image1)