I am glad that 'just before 530' is the recognized dating for the MG
incuse coinage, by scholars. NK
Rutter uses the 550 for Sybaris, and 540 for
Metapontum in
his Historia Numorum Italy. But, relative means of dating get refined and I am especially not familiar with scholarship outside of English. My familiarity with articles, even in English, is spotty. Books, I am better, but most are for particular mints, and therefore, quite dated.
I just threw out
Corinth, there is
hoard of early Sybaris, and Corinthian with the
incuse stamp in
Magna Graecia, and I wasn't sure when the double relief started, for
Corinth or anywhere else for that matter.
So,
Athens, somewhere between 525 and 506 BC, begins double relief coinage. It is interesting to me, because I feel that technology evolves with the path of least resistance, and that double relief is the natural successor in coinage from the
reverse incuse stamp coins (which come roughly after
incuse punch). The
incuse types of the
Magna Graecia coins are a bad design (imo) because the clashing of the dies through the thin metal
flan wear out the dies. Therefore, I am not sure the
incuse would have been introduced after the double relief coinage was introduced. The
incuse types of MG are very interesting, but as far as the evolution of technology it seems to me they are a dead-end.
Looking at the dates for the Athenian double relief coinage, it seems like the question is whether the owls come from the era of Peisistratos and
his sons, Hipparchus and Hippias, or shortly after.