Historical clue formulations

• Trading card enthusiasts? — 2024-06-22
• Friends you may never have met — 2020-11-29
• Foreign correspondents? — 2009-02-08
• Writing set? — 2006-07-09
• Exotic stamp collectors, maybe — 2004-01-24
• Distant friends — 1998-12-04
• Foreign correspondents? — 1997-04-26