CoinWorldTV Guernsey (British Dependency). Large Copper 8 Doubles Coin. aXF-Reference: KM-7. Denomination: 8 Doubles Condition: Edge-hit at 8 o’clock (reverse), minor deposits, otherwise about XF! Material: Copper Diameter: 32mm Weight: 9.38gm Obverse: Value (8) above denomination (DOUBLES) and date (1889). Reverse: Shield with national arms of Guernsey (three lions) above, topped by thre ...