Sap thanks for all the information you provided that's really interesting. I love the history surrounding the coins so really enjoyed reading that.
I had been doing a bit more research and found similar information to what you said above although not in as much detail as you provided.
It does seem the info on this coin differs on different websites.
Some date it to not long after the battle of Phillipi in Octavians time and other sites attribute it to be produced in Cladius / Neros era as you said.
So is it the fact it says victory of the emperor prior to Octavian actually been Augustus / Emperor shows it was minted later?
Many thanks for your help.