STAMPS
| Date | Clue |
|---|---|
| 2024-06-20 | Airport acquisitions |
| 2020-08-16 | They can get canceled |
| 2017-04-16 | Philatelist's collection |
| 2013-04-13 | They get stuck in corners |
| 2011-09-04 | Sticky roll? |
| 2009-07-21 | They may come in sheets |
| 2000-05-17 | Collecting field |
| 2000-01-13 | Postage |
| 1999-12-22 | Philatelist's collection |
| 1994-01-30 | Post-office pane |