Historical clue formulations

• Personal ad abbr. — 2022-12-30
• Certain bachelor, in personals — 2020-01-27
• Letters in a personals ad — 2016-12-26
• Personal ad designation — 2016-05-27
• Certain bachelor, in personal ads — 2016-03-08
• Personal ad abbr. — 2015-06-08
• Certain guy "ISO" someone — 2014-02-15
• Guy seeking love letters? — 2013-07-18
• Initials in a personal ad — 2012-08-10
• Certain guy, in personals shorthand — 2008-07-06
• Personal ad abbr. — 1995-12-19