Historical clue formulations

• Big name in diamonds — 2012-07-25
• Big name in diamonds — 2012-06-01
• "A diamond is forever" sloganeer — 2009-05-06
• "A diamond is forever" sloganeer — 2006-01-14
• Big name in diamonds — 2003-06-09
• Big name in diamonds — 2001-05-25