Constans II, AR hexagram, Constantinople.

Fragmentary legend, Facing, draped busts of Constans and
Constantine IV, Constans wearing a plumed helmet above
his crown, cross between their heads.
DEUS ADIUTA ROMANIS, Heraclius on left, and Tiberius on
right, both crowned, wearing chlamys and holding a cross
on globe, standing facing to left and right of a cross 
potent on globe on three steps.

Sear 998; MIB 152; DOC 57

With permission of www.slaveycoins.com, March 2012.