| 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, star |
| Reverse inscription | ΦΙΛΑΔΕΛΦΕΩΝ ΕΡΜΟΓΕΝΗΣ ΟΛΥΜΠΙΟΝΙΚΗΣ |
| Reverse design | laureate busts of the Dioscuri, jugate, right; to left, palm branch |
Coin no. 1 of RPC I, 3023
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| URI | https://rpc.ashmus.ox.ac.uk/coin/309719 |
| Museum | British Museum, London (UK) |
| Inventory no. | |
| Reference | BMC 53 = NC 1889, 240 = Trillmich, Taf. 14.13 |
| Diameter | 18 |
| Weight | 4.93 |
| Axis | 12 |
| Note |