#C3a, 24c Carmine rose and blue, Center Inverted, the unique position I with natural straight edge at top and full sheet margin selvage at left. In October of 1942 this particular stamp was purchased by the consignor in the Irwin Heiman auction offering a portion of the massive collection formed by Col. Green. This was one of the unique position pieces Col. Green retained from the sheet when he broke it up. It has not been offered since 1942. This fine example is without gum and is not plagued by any of the faults that have befallen several other air mail inverts. Being the first position from the unique sheet adds even more excitement to an error that has caught the fancy of the philatelic world. (see special color photo and front cover photo)