Historical clue formulations

• Rare and valuable instruments — 2019-11-24
• Very rarely heard instruments — 2014-04-04
• Cremona craftwork — 2013-11-10
• Classic Cremona family — 2009-05-24
• Fine fiddles — 2006-05-10
• Famous Cremona family — 2003-11-08
• Cremona craftwork — 2002-09-15
• Superior strings — 2001-11-30
• Valuable violas — 2001-02-03
• Valuable strings — 1999-02-14
• Musicians' treasures — 1997-05-31
• Valued violins — 1996-07-25
• Cremona craftings — 1995-04-08