Historical clue formulations

• Prestige — 2023-05-07
• Prestige — 2018-10-26
• Prestige — 2018-05-02
• Sign of prestige — 2008-05-12
• Philatelic design on an envelope — 2005-10-30
• Mark of prestige — 2005-08-05
• Seal — 1999-07-24
• Mark of official approval — 1997-06-22
• Prestige — 1997-05-19