Have a nice day and health.
I have only a slightly supplementary opinion on this. I know that professionally you are at a much higher level than me. However, I live in a place where within a distance of 30 km. in all directions are the tombs of the "Celts" and in them coins imitating the first Greek coins.
What a difference of opinion or rather an addition:
I see the need for coins in the barter trade among the Celts in Central Europe -rather than culture and perfect coin design so when they came back from fighting from Daddy Alexander the Great I think Fillip II. ( he invited them and hired them as paid military units ). After returning home, they brought real coins however, they continued to pay traders with them and got the common need to make new ones.
Therefore, they were not interested in culture - story and depiction, but only a means of exchange as a much needed thing.
Dad of Philip II. Alexander the Great's son thinks he was the Olympic winner of the Horse Riding Games-And compare Greek old coins and his horses and, conversely, look at the horses that the Celts put on imitations.
And I would also like to lead a longer opinion, I will only shorten it : Do you know why 700 possible 800 years later the Slavs did not have coins here where I live?
Last week, an archaeologist said,, The ancient
Slavs lived like Hippies and did not feel the need to pay for anything and did not need to buy
slaves,,

which is then an imitation and how to recognize it?
https://www.google.com/search?sxsrf=ALeKk0397Jxu2eFRicw4mKt2lj0cW4-sXg:1626162126577&source=univ&tbm=isch&q=keltsk%C3%A9+napodobov%C3%A1n%C3%AD+%C5%98eck%C3%BDch+minc%C3%AD&sa=X&ved=2ahUKEwiQ5Jr_xd_xAhXHyaQKHZXvCQsQjJkEegQIBxAC&biw=1093&bih=500
( I still haven't learned to shorten this link, maybe someone will send me instructions)
Regards Ivan