GPO
Set to 13 different clues across 14 published puzzles, most often “Mail place: Abbr.” — The New York Times, Wednesday, 5 April 2006.
3 letters
Every clue on record, most used first
- Mail place: Abbr.2 times
The New York Times — Wednesday, 5 April 2006
- Mailing HQonce
The New York Times — Sunday, 14 March 2010
- Ltr. centeronce
The New York Times — Saturday, 23 May 2009
- Delivery notation: Abbr.once
The New York Times — Thursday, 28 August 2008
- Main mailbox locale: Abbr.once
The New York Times — Sunday, 25 May 2008
- Mail ctr.once
The New York Times — Wednesday, 13 February 2008
- Mail-sorting ctr.once
The New York Times — Sunday, 20 November 2005
- Mailing ctr.once
The New York Times — Thursday, 29 July 2004
- Address abbr.once
The New York Times — Wednesday, 17 March 2004
- Main mail ctr.once
The New York Times — Thursday, 14 November 2002
- Bldg. with boxesonce
The New York Times — Sunday, 5 May 2002
- Major mail ctr.once
The New York Times — Friday, 11 October 1996