A block of the famous right-side-up version of the “Inverted Jenny” postage stamp sold for $59,250 at a February James Julia auction. One sheet of the 1918 stamp had been misprinted with the biplane upside down. A block of four of the misprinted stamps sold for $1.5 million in 2005. A plate-number block of four sold in 2014 for over $4.8 million. In 2013, the post office reissued the Inverted Jenny stamp to commemorate the most famous of all misprints. It secretly added 100 new sheets of six-stamp blocks of the right-side-up Jenny, making a misprint of a misprint. Over 2 million of the correct commemorative Inverted Jenny stamps were printed and offered for sale in sealed envelopes. The 100 misprints were packaged with instructions to telephone for a certificate explaining its rarity. The auctioned block and 23 other blocks are all that have been found. About a million of the commemorative stamps are still unsold. A very confusing part of philatelist history.