John, this post is over a year old, im just trying to find out about the coin because i posted mine on a post today 2017 St. Paddys day
Zumbly has the key info above: The M. Cato on your coin may be Marcus Porcius Cato the younger's father, or some other relation.
In my view, you are correct, Severus and Zumbly: the "VICTRIX" piece could not have been struck under the more famous "Cato the Younger", who was a moneyer 47-46 BC and (as someone else has pointed out) was only six years old in 89 BC. The other logical choice would be M. PORCIUS CATO, the father of "Cato the Younger", was was a tribune ca. 99 BC and apparently ran for the praetorship in 91. Sources say he died before the end of the Social War (88 BC), so the suspicion must be strong that it was this Cato who struck the piece (thus he must have been a moneyer ca. 90-89 BC, just prior to his death).
Curious: did not young noble Romans start their political careers via the Cursus Honorum in the Moneyer position before they aspired for offices such as Praetor, Aedile, Tribune, etc etc?
haha...you da man on the Republic now... and i have one o dese coins....it isn't what i thought it was and it's seldom what i think it is...9_9..