As far as the different appearance of the captive on the
reverse, it would seem odd, if representing a Jew, that the captive is beardless as it was the custom for the Jews to wear a beard. However, during extreme sorrow, shame or humiliation the beard was often mutilated or removed.
Compare Isa. 15:2 "He has gone up to The House and to Di′bon, to the high places, to a weeping. Over Ne′bo and over Med′e·ba Mo′ab itself howls. On all heads in it there is baldness; every beard is clipped."
And Jeremiah 41:5, "then there came
men from She′chem, from Shi′loh and from Sa·
mar′i·a, eighty
men with their beards shaved off and with their garments ripped apart and with cuts made upon themselves, and there were grain offering and frankincense in their hand to bring to the house of Jehovah."
I agree though, it's unlikely that we will know for sure.
Nemo