"Viminacium Sestertius" In Acsearch, 279 Hits But Never Call Sestertius.

It's a common practice for Viminacium, isn't it? There must be some authoritative source. It always helps to tell a story when selling a coin. A paragraph explaining why the coin is or isn't a sestertius would keep the trolls quiet and give potential bidders a sense of ownership.

A quick glance at wiki
"Viminacium was the provincial capital of Moesia Superior
In the late spring of 293-294, Diocletian journeyed through his realm, and he re-organized Viminacium as the capital of the new province of Moesia Superior Margensis
He registered that the people wrote in Latin, as opposed to Greek in the southern provinces
Viminacium was the base camp of Legio VII Claudia, and hosted for some time the IIII Flavia Felix
It had a Roman amphitheatre with room for 12,000 people"

Since it was an official Roman Colony and straddled the eventual divide between the "two" Roman Empires
it would seem to make sense that the Latin speaking city dwellers would have used the term Sestertius
The rural populations may have spoken in Greek dialects

Let's assume that four Sestertius does actually equal a denarius in Rome as people state they did.

1. In Viminacium would 4 Viminacium local Sestertius equal a Roman official silver denarius?
2. In Rome would 4 Viminacium local Sestertius you brought into the city equal a Roman official silver denarius?