The pound was the currency of the Commonwealth of Massachusetts and its colonial predecessors until 1793. The Massachusetts pound used the £sd currency system of 1 pound divided into 20 shillings, each of 12 pence. Initially, sterling coin and foreign currencies circulated in Massachusetts, supplemented by pine tree shilling produced by the "Hull Mint" between 1652 and 1682 and by local paper money from 1690. The paper money issued in colonial Massachusetts was denominated in £sd, although it was worth less than sterling. Initially, six shillings were equal to one Spanish dollar. After years of high inflation, in 1749 Massachusetts withdrew its paper money from circulation and returned to specie. Massachusetts once again began issuing paper money after the American Revolutionary War began in 1775. The state currency depreciated greatly and was replaced by the U.S. dollar in 1793. Coins Shillings were issued in denominations of 3 and 6 pence and 1 shilling. The first pieces bore the letters "NE" and the denomination "III", "VI" or "XII". The coins (the pine tree shillings) were smaller than the equivalent sterling coins by 22.5%. Later pieces, struck between 1652 and 1660 or 1662, bore the image of a willow tree, with an oak tree appearing on coins produced between 1660 or 1662 and ca. 1667. However, the most famous design was the final one to be issued, the pine tree type, struck between ca. 1667 and 1682. The coins circulated widely in North America and the Caribbean. The shillings nearly all bore the date "1652". This was the date of the Massachusetts Bay Colony legislation sanctioning the production of shillings. The date was maintained by the Massachusetts moneyers in order to appear to be complying with English law that reserved the right of produce shillings to the crown, since, in 1652, England was a Commonwealth (King Charles I having been beheaded three years previously). The shillings were struck by John Hull and Robert Sanderson, two Massachusetts settlers. The image of the pine tree on the later coins may symbolize an important export for Massachusetts - pine trees for ships' masts. The "Hull Mint" producing the pine tree shillings was closed by the English government in 1682. Paper money From 1690, paper money was issued, denominated in £sd. The notes were printed from engraved copper plates (probably the work of silversmith Jeremiah Dummer). The pine tree shilling struck by "The Hull Mint" in