 Previous issues of silver coinage had been irregular, and the last issue, minted in 1787, was not intended for issue to the public, but as Christmas gifts to the Bank of England's customers.New silver coinage was to be of .925 (sterling) standard, with silver coins to be minted at 66 shillings to the troy pound.Hence, newly minted shillings weighed  troy ounce, equivalent to 87.273 grains or 5.655 grams.