Dear timka,
The day I can answer all of those questions, everything about
Constantine’s coinage has been resolved ☺ These questions are the core of my research since several years.
First, we must recognize that – during this period (324-337) - there were only limited issues of silver. They were all donatives, never coins. There were no simultaneous issues across the empire. Every
mint and every issue was individual and for a specific purpose. For the years 324-330, all such issues were struck only where
Constantine and the court resided (apart from Trier).
For example (the most complicated
mint), at
Constantinople there are probably five issues of the
Victoria type.
One thing is reasonably clear: the
CAES and
CAESAR varieties were struck simultaneously in the same issue, so they have no bearing on the issues.
So far, the only way to distinguish issues is by the
mint mark (but that is repetitive) and the combination of caesars (associated by
style, but again, that is a subjective criterion). A few issues, like the M issue of
Constantinopolis are well defined, but others are rather vague.
I have a data base including all known examples of these
types. New specimens are continuously added, allowing better resolution. There is
hope that most of the issues will be resolved in the near future.
Best regards,
Lars