Lot 1451 France #3c 1849 20c Black Cérès Horizontal Tête Bêche Pair, used, with two lozenge cancels and clear to large margins all around. “Gris-noir” shade, signed and accompanied by 2001 Roger Calves certificate. fine-very fine. (Yvert & Tellier #3e, 8,500 Euros). Scott CV$6,600