|The new 12-sided pound coin released earlier this year|
The Mint bought silver at the prevailing market price in the quantity it thought necessary and believed that by limiting the quantity of silver coin supplied it could maintain the value of the coins above the value of their silver content; that is, the supply limitation would give value to the fiat component of the currency. (pdf)While this worked at first, over the next decade the mechanism for maintaining an artificial shortage—and thus the fiat component of the government's new tokens—broke down. From Redish, we learn that throughout the 1820s the new tokens began to accumulate at the Bank of England, still then a private bank, which had a policy of accepting tokens at their official value from the public, providing gold in return. (The Mint itself had no conversion policy.) The Bank had effectively become the only redemption agent for government tokens. Without the Bank's sopping up the public's unwanted supply at par, the market value of silver tokens would have quickly become unhinged from the coin's face value, eventually falling in price to the market value of their metal content.