526var, 2¢ Carmine, Type IV, Bottom Plate Block of 6 no. 10873, with two ghost Plate no's, Fine NH Cat($450) (Image)

$275

588var, 7¢ Black, Fine NH, with "split" offset on reverse Cat($26) (Image)

$40

1710a, 13¢ SPIRIT OF ST. LOUIS, TOP MARGIN HORIZONTAL PAIR, IMPERF ERROR, F-VF NH, with 1986 Philatelic Foundation certificate Cat($700) (Image)

$700

2388var, 25¢ Richard E. Byrd, Black Engraved Color Omitted ERROR, VF NH, with normal stamp and unaddressed FDC with Artcraft cachet, 1998 Philatelic Foundation certificate (Image)

$155