OBOL
4 letters
Historical clue formulations
- Ancient Greek coin — 2016-06-16
- Coin to pay for passage across the River Styx — 2015-05-31
- One-sixth of a drachma — 2012-09-30
- Ancient Greek coin — 2012-06-19
- Silver coin of ancient Greece — 2010-03-09
- Ancient Greek coin — 2000-03-03
- Ancient Greek coin — 1997-04-25
- One-sixth of a drachma — 1995-03-19