Antoninus Pius 138-161 AD.
Ae 21 7.09gm Ascalon Judea.
Ob: Laurate head right, legend possibly (ANTWNINOC CEBAC)
Rev: City goddess possibly Derkers standing right foot on rock holding sceptre in left and dove in right hand. Legend possibly (ACKALWN).
Colour difference is where I shifted light source to highlight features.