Only one pane of 100 of the invert stamps was ever found, making this error one of the most prized in all philately; an inverted Jenny was sold at a Robert A. Siegel auction in November 2007 for US $977,500.
Only one pane of 100 of the invert stamps was ever found, making this error one of the most prized in all philately. An inverted Jenny was sold at a Robert A. Siegel auction in November 2007 for US $977,500.