on 6d. rose, unused without gum; thin spot and light corner crease otherwise fine. B.P.A. Certificate (1998). S.G. 21, £650. Photo" /> unused <I>"Twelve/Cents"</I> on 6d. rose, unused without gum; thin spot and light corner crease otherwise fine. B.P.A. Certificate (1998). S.G. 21, £650. Photo | Christie's