Historical clue formulations

• Engraving instrument — 2022-08-07
• Engraver's instrument — 2017-02-22
• Surgeon's probe — 2010-11-17
• Sharp-pointed instrument — 1999-01-04
• Sharp-pointed instrument — 1998-06-14
• Surgical probe — 1997-10-12
• Engraving instrument — 1994-11-13