Z900guy;
Welcome to T-Net.
Great find.
Coin looks like R.I.C. 574.
One sold in Sept. for $125 but not as good as yours.
Keep digging.
Don....
Edit: Julia Domna, Wife of Septimius Severus, Silver Denarius, about 3.48g., Rome mint, A.D. 203, draped bust of Julia right, hair elaborately waved and turned up low at the back, IVLIA AVGVSTA, rev., Pietas standing left, both hands raised in invocation, altar at feet, PIETAS PVBLICA, (RCV 6601; RIC 574).