... This example has a 12 mm diameter. Is it also described by Kinns or is this just a variant of the one you mentioned in the link? ...
Ancient coins have been handmade, so there is a certain variation of size and
weight within a single
type. Bronzes are varying more than silver and gold. So it is the same
type.
... Rev: EPY / ΠOΣEIΔΩNIOΣ HPAKΛEOY TOY EΠIKOYROY"[/i][/i]. Could it be that this Kordupos Epikuros was his father. That would date this coin. ...
The coin with ΚΟΡΔΥΠΟΣ EΠIKOYPOY is dated by
Kinns with "c. 220-170 B.C.", the coin with ΠΟΣΕΙΔΩΝΙΟΣ ΗΡΑΚΛΕΟΥ ΤΟΥ EΠIKOYPOY to "c.70-60 B.C.". So they have been probably not father and son.
Besides of that I'm not sure whether EΠIKOYPOΣ in the second case really is a father's name (and in this case on both coins would be the father's name), usually after the TOY follows a city's name or something like that
.
Regards
Altamura