I guess this ones odd in that Tranquilliana is by her self. Tranquillina, Augusta 241-244 A.D., Singara, Mesopotamia Bronze AE 26, S 3867, BMC 14, Singara mint, 180°, 241 - 244 A.D.; obverse CAB TPANKVΛΛINA CEB, diademed and draped bust right; reverse CVP CEΠ KOΛ CINΓAPA, veiled and turreted bust of Tyche right, centaur Sagittarius above, discharging bow; rare