STRIA
| Date | Clue |
|---|---|
| 2022-09-04 | Narrow groove |
| 2013-01-26 | Tiny groove |
| 2011-09-15 | Tiny groove |
| 2009-09-10 | Small groove |
| 2009-02-15 | Narrow groove |
| 2004-05-13 | Minute groove |
| 2003-07-13 | Narrow groove |
| 1997-11-30 | Architectural flute |
| 1997-07-16 | Narrow furrow |
| 1994-12-04 | Narrow furrow |
| 1993-12-31 | Small groove |