Coin with sand patina.
Byzantine Empire
Heraclius, Martina and Heraclius Constantine (610–641), Follis RY 9 (618-619 AD), Constantinople mint, 1st officina
Obverse: Martina, Heraclius, and Heraclius Constantine standing facing, each holding globus cruciger
Reverse: large M between ANNO and X Ч I I, cross above, across field A CON
Diameter 31 mm, weight 11.34 g