Gambia 1906 Rare 1d Surcharge Double with Certificate

1906 KEVII 1d on 3/- SURCHARGE DOUBLE (SG 70a). A VF/M well-centered example with nicely separated impressions of the double surcharge. Fresh, barest traces previous hinging. A rare stamp. Photo-cert: BPA. (cv£1800). See clickable image of certificate below.