Denario ¹, Zecca di Roma, 196-211 d. C., RIC IV/I 572, BMC/V 66, C/IV 150, indice di rarità "comune"
D. IVLIA  AVGVSTA². Testa di Giulia Domna a destra (cinque pieghe nei capelli). 
R. PIETAS  AVGG³.  Pietas velata, drappeggiata, in piedi di fronte, testa a sinistra, sacrifica da una patera tenuta con la mano destra sopra un altare acceso e inghirlandato posto a sinistra e sorregge una scatola di profumi con la mano sinistra mentre un lembo del drappeggio ricade al di sopra del braccio sinistro.

A titolo di confronto e per le indicazioni di valore trascrivo i seguenti link relativi a monete di tipologia simile presenti nel WEB (molti altri link si possono reperire attraverso il motore di google, imponendo, come chiave di ricerca, "IVLIA AVGVSTA PIETAS AVGG"):

1. http://www.wildwinds.com/coins/sear5/s6600.html Ref Julia Domna Denarius, RIC 572, RSC 150, BMC 62 Julia Domna Denarius. IVLIA AVGVSTA, draped bust right / PIETAS AVGG, Pietas standing left, veiled, sacrificing on altar left & holding incense box. RSC 150.
2. http://www.wildwinds.com/coins/ric/julia_domna/RIC_0572.1.jpg Julia Domna Denarius Roman Empire, Julia Domna, wife of Septimius Severus, 193-211 AD. Silver Denarius, 3.3 grams Obverse:  IVLIA AVGVSTA, Draped bust of Julia right. Reverse:  PIETAS AVGG, Pietas, veiled, standing left dropping incense on altar and holding box. The reverse legend reads Pietas Augustii (the double G signifies two reigning emperors).  Pietas was the personification of devotion to the gods, duties, emperor and state.  On the coinage of Rome Pietas was sometimes used as a call to duty or allegiance to the emperor during times of crisis.  She is usually depicted as  she is on this coin sacrificing over a flaming altar and burning incense from a box which she holds. Background:  Julia Domna was born at Emesa in Syria and came to Rome as a young woman.  In 173 AD she was married to Septimius Severus as his second wife.  In 188 AD she bore him a son, the future emperor Caracalla, and in the following year, another son, Geta, who was also to become emperor.  She was a woman of brilliant intellect and Severus  often consulted her on matters of importance and was frequently guided  by her counsels.  In 217 AD after the murder of her son Caracalla, she considered her position to be hopeless and committed suicide by starving herself to death. References:  The Roman Imperial Coinage, Volume IV, #582  //  British Museum Catalog #62
3. http://www.aeternitascoins.com/ProductPages/Imperial/SeptServ-SevAlexander.html I0171 - $43.00 SOLD Julia Domna AR Denarius Obverse: IVLIA AVGVSTA Obverse type: Bust draped right Reverse: PIETAS AVGG Reverse type: Pietas standing left holding box in left and dropping incense on flaming altar with right. Date: 196-211 AD Mint: Rome Size: 19 mm Weight: 3.15 grams Reference: RSC 150 Reference: VanMeter 39

Un saluto cordiale. 
Giulio De Florio
www.monetaromana.it

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Note: 
(1) Di seguito sono indicate le caratteristiche fisiche di 6 denari della stessa tipologia di figura censiti da BMC: