20 Pf halved as 10 Pf used on piece with date stamp "Cameroon 3 / 10 98", twice signed Bothe BPP and detailed photo expertize Bothe BPP: "is in every respect as genuine recognized - having very fresh colors and clean condition - value-reducing quality defects or repairs samples not to prove - was use-caused used. " very rare by only 100 pieces edition! Michel on cover 20.000.-