this coin has an equilateral cross with dots in each corner on the helmet
Constantine I
A.D. 319
20mm 3.3g
CONSTANTI-NVS AVG -- high crested helmet, cuir., spear across r. shoulder, shield on left arm
VICT • LAETAE PRINC PERP -- two Victories stg., facing one another, together holding shield inscribed VOT PR on altar inscribed with the letter I.
In ex. •BSIS•
RIC VII Siscia 84