in black on 8c. mauve, 2mm. setting, variety surcharge double, one inverted, some off-setting on reverse, unused with some original gum. B.P.A. Certificate (1949). Photo" /> unused --<I> "6/Cents"</I> in black on 8c. mauve, 2mm. setting, variety surcharge double, one inverted, some off-setting on reverse, unused with some original gum. B.P.A. Certificate (1949). Photo | Christie's