Constans AD 337-350. AE4 of Cyzicus. AD 346-348.

CONSTA-NS PF AVG, laureate, draped, cuirassed bust left.
GLOR dot IA EXERC-ITVS, two soldiers holding spears and shields with one standard between them with O on banner.

Mintmark SMKA.

RIC VIII Cyzicus 11.

With permission of Savoca Numismatik Auction 7 Blue , Lot 1619, May 2018. (corrected, the somewhat ornate K of the mintmark mistaken for an N).

Cyzicus is the only mint with the combination left bust, this legend with CONSTA-NS break and GLOR dot IA.