Historical clue formulations

• Mere placeholders — 2022-08-12
• Arcade "money" — 2021-05-12
• Symbolic gestures — 2021-02-28
• Substitutes for coins — 2019-09-02
• Wooden nickels, e.g. — 2017-11-19
• Game pieces — 2016-08-13
• Some board game equipment — 2012-12-27
• "The Lion Sleeps Tonight" hitmakers, with "the" — 2012-03-16
• Arcade game inserts — 2007-05-27
• Some coins — 2004-07-01
• Amusement arcade items — 2002-02-01
• Underground purchases — 2001-04-07
• City dweller's pocketful — 1997-05-16
• Appreciation units? — 1995-12-01