This stamp was sold in the recently concluded 2-6 March 2010 Auction by Corinphila. The pre-sale estimate was CHF100,00 but it was eventually sod at the hammer price of CHF200,00

This is the sale description:

1851: (June 14) 12 d. black, imperforate on the original 1851 vertically laid paper manufactured by the Ivy Mills of Chester, Pennsylvania and clearly showing the laid lines on the reverse; the legendary mint example with enormous margins all round, of outstanding colour and freshness, with minor vertical bend mentioned for utmost accuracy, full unmounted original gum. This marvellous classic stamp was sold by Corinphila (sale 51, lot 4222, March 1966) and then graced the Josiah K. Lilly collection (Siegel, lot 336, March 1967) and was again sold by Corinphila (sale 63, lot 2331, March 1980). The stamp is accompanied by 1965 J. N. Sissons photo certificate showing obverse and reverse of stamp, stating “genuine and flawless, brilliant original gum, never hinged and immaculate in all respects. I believe it to be the finest existing copy”. A wonderful and famous stamp for the philatelic connoisseur. Ex collection Fritz Kirchner (Scott 3 = $ 110′000/Gi = £ 150′000).