WB description: Silver (UK), 99.9% refined, London afternoon fixing; prior to July 1976 Handy & Harman. Grade prior to 1962 unrefined silver.
Sources: Platts Metals Week; Metals Week; Metals Statistics; American Metal Market, Australian Mineral Economics Pty. Ltd.,The Silver Institute, Silver World Supply & Demand, London Bullion Market; Thomson Reuters Datastream; World Bank.