Septimius Severus and Caracalla, AE29 of Nikopolis ad Istrum, Moesia Inferior. 

[AV] K L CEP CEVHROC P AV K M AVRH ANTWN[INOC], laureate, 
draped and cuirassed bust of Septimius Severus right, facing
laureate, draped bust of Caracalla left.
UPA OOUI TERTULLOU NIKOPO PROC I around four line legend 
EU-TUCWC-TOIC KU-RIOIC within wreath.

Varbanov 2828 var.; AMNG - (cf 1625 for Caracalla and Geta).

With permission of Numismatik Lanz, Munich
Sold for 550 Euros (ca. $546)