Historical clue formulations

• U.S. currency: Abbr. — 2024-09-22
• "Almighty" item: Abbr. — 2013-11-17
• Aust. currency — 2013-01-03
• Currency board abbr. — 2012-05-23
• Capital of Australia: Abbr. — 2012-03-08
• Capital of the U.S.: Abbr. — 2011-08-31
• Capital of the U.S.? — 2010-10-28
• Capital of New Zealand: Abbr. — 2007-08-04
• Can. money — 2006-01-29
• Currency board abbr. — 2005-11-18
• Euro competitor: Abbr. — 2003-10-12
• Currency abbr. — 2003-04-11
• U.S. or Can. money — 2003-01-06
• Capital of Canada: Abbr. — 2002-08-24
• U.S. currency: Abbr. — 2001-10-02
• Competitor of the euro: Abbr. — 1999-01-29
• It makes a lot of cents: Abbr. — 1997-09-12
• Abbr. at an exchange office — 1996-09-29