Historical clue formulations

• First-rate — 2019-02-08
• Prime — 2012-12-27
• Superior — 2007-06-24
• Superior — 2000-07-29
• Between prime and good — 2000-05-28
• Fine — 1999-07-01
• Prize — 1997-07-20
• First-rate — 1997-04-23
• Cream — 1996-11-23
• High-grade — 1995-10-13