country which maintained a bimetallic standard during most of the 19th century. Gold standard origin in Britain The English pound sterling introduced c 800 CE was initially a silver standard unit worth 20 shillings or 240 silver pennies. The latter initially contained 1.35 g fine silver, reducing by 1601 to 0.464 g (hence giving way to the shilling [12 pence] of 5.57 g fine silver). Hence the pound sterling was originally 324 g fine silver reduced to 111.36 g by 1601. The problem of clipped, underweight silver pennies and shillings was a persistent, unresolved issue from the late 17th century to the early 19th century. In 1717 the value of the gold guinea (of 7.6885 g fine gold) was fixed at 21 shillings, resulting in a gold-silver ratio of 15.2 higher than prevailing ratios in Continental Europe. Great Britain was therefore de jure under a bimetallic standard with gold serving as the cheaper and more reliable currency compared to clipped silver (full-weight silver coins did not circulate and went to Europe where 21 shillings fetched over a guinea in gold). Several factors helped extend the British gold standard into the 19th century, namely: The Brazilian Gold Rush of the 18th century supplying significant quantities of gold to Portugal and Britain, with Portuguese gold coins also legal tender in Britain. Ongoing trade deficits with China (which sold to Europe but had little use for European goods) drained silver from the economies of most of Europe. Combined with greater confidence in banknotes issued by the Bank of England, it opened the way for gold as well as banknotes becoming acceptable currency in lieu of silver. The acceptability of token / subsidiary silver coins as substitutes for gold before the end of the 18th century. Initially issued by the Bank of England and other private companies, permanent issuance of subsidiary coinage from the Royal Mint commenced after the Great Recoinage of 1816. A proclamation from Queen Anne in 1704 introduced the British West Indies to the gold standard; however it did not result in the wide use of gold currency and the gold standard, given Britain's mercantilist policy of hoarding gold and silver from its colonies for use at home. Prices were quoted de jure in gold pounds sterling but were rarely paid in gold; the colonists' de facto daily medium of exchange and unit of account was predominantly the Spanish silver dollar.