unused ½c. on 3ca. orange-yellow, variety surcharge double, a horizontal pair, pane 2 [18-19], showing clipped perfs. at foot from the bottom of the pane, fresh mint and a superb multiple of this rare variety. It should be noted that this pair is the companion to that sold from the M.D. Chow collection and forms the lower half of a block of four. Chen Shih Jen Certificate (1998). S.G. 37d, Chan 37k. Photo