| Province | Asia |
| Subprovince | Conventus of Halicarnassus |
| City | Cos |
| Region | Caria |
| Reign | Uncertain |
| Obverse inscription | ΝΙΚΙΑΣ |
| Obverse design | wreathed head of Nikias, right |
| Reverse inscription | ΚΩΙΩΝ ΚΑΛΛΙΠΠΙΔΗΣ |
| Reverse design | laureate head of Asclepius, right |
Coin no. 2 of RPC I, 2728
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| URI | https://rpc.ashmus.ox.ac.uk/coin/307112 |
| Museum | British Museum, London (UK) |
| Inventory no. | 1961,0301.332 |
| Reference | |
| Diameter | 31 |
| Weight | 20.13 |
| Axis | 12 |
| Note | |
| External URI | https://www.britishmuseum.org/collection/object/C_1961-0301-332 |