I would like to ask for some assistance in nailing down the ID of this coin. It is rather large, dupondius-sized at 27mm and measuring 12.9g. The obverse features two heads facing each other. Most of the legend is obliterated save for the ending, which appears to read ΔΟΗ... Reverse has what I believe is Athena standing, with shield to her right, at her feet. Again, legend is tough but I think I see ....Π...ΛΙ...O There aren't terribly many options here. GUESS: Macrinus & Diadumenian
That's a tough one - I lean toward Diadumenian and Macrinus - and agree with @Roman Collector that it is probably Markianopolis. I think an Athena reverse.cancel that - I think I see a spoke.
Just a point about terminology, @hotwheelsearl -- Jugate comes from the Latin term for cheek and jugate busts are cheek to cheek, like this: Confronted busts are face-to-face, like this:
Doug, I'm having a tough time, but it might just be C and D. I think the right-hand head's a bit smoother than the textured Diadu head. I'll have to break out the electron microscope on this one
I think Doug is correct! I "think" I see ....ΔΟΜ... (for Domna) on the obverse legend at about 4 or 5 o'clock. And I "think" I see part of the magistrate's name VΠ (KVNTI)ΛIANO(V) (Quintillianus) on the reverse, who struck coins only for Caracalla alone, and Caracalla and Julia Domna. He is named also on Doug's coin. Also, I "think" I see an Є in the left reverse field...as on Doug's.