GST
Set to 6 different clues across 11 published puzzles, most often “Prime meridian std.” — The New York Times, Wednesday, 6 January 2010.
3 letters
Every clue on record, most used first
- Prime meridian std.5 times
The New York Times — Wednesday, 6 January 2010
- Clock std.2 times
The New York Times — Sunday, 1 February 2004
- Setting at 0 degrees long.once
The New York Times — Saturday, 3 March 2007
- Standard setting at 0° long.once
The New York Times — Friday, 14 July 2006
- Standard setting at 0 degrees long.once
The New York Times — Friday, 7 April 2000
- Astron. clock settingonce
The New York Times — Sunday, 15 September 1996