| Province | Asia |
| Subprovince | Conventus of Sardis |
| City | Philadelphia |
| Region | Lydia |
| Reign | Caligula |
| Obverse inscription | ΓΑΙΟϹ ΚΑΙϹΑΡ |
| Obverse design | bare head of Caligula, right; to left, lituus |
| Reverse inscription | ΦΙΛΑΔΕΛΦΕΩΝ ΑΤΤΑΛΙΚΟϹ |
| Reverse design | winged thunderbolt |
Coin no. 1 of RPC I, 3026
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| URI | https://rpc.ashmus.ox.ac.uk/coin/309730 |
| Museum | Berlin, Staatliche Museen (Germany) |
| Inventory no. | I-B |
| Reference | LS 20 |
| Diameter | 15 |
| Weight | 2.77 |
| Axis | 12 |
| Note |