In the past, Money Digest has discussed how much it costs to manufacture U.S. currency, what it's really made from (hint: it's not paper), and ... bills in the United States: $1 bill: 6.6 years ...

See SDR Valuation. The value in terms of the SDR of each of the other currencies shown above is derived from that currency's representative exchange rate against the U.S. dollar as reported by the ...

WASHINGTON, June 5. -- For some months past the Treasury has been changing the denominations of United States paper currency of every description in pursuance of a recommendation of Treasurer Roberts.