Historical clue formulations

• Spiked wheel on a boot spur — 2020-11-01
• Tool with a pointed blade — 2020-01-09
• Spur part — 2011-09-17
• Wheel on a spur — 2010-02-03
• Wheel on a spur — 2007-08-12
• Wheel on a spur — 2006-01-08
• Part of a spur — 2002-08-04
• Spur part — 2000-12-29
• Wheel on a spur — 1999-06-29
• Part of a spur — 1998-12-02
• Part of a spur — 1995-07-23