Many coins survive of this type:
Another one is in my forum avatar. They were from the Greek city of Pantikapaion, and the Pan head on the coin was a pun for the "Pan" in the city name. (Pan-pun-Pan, no pun intended).
The origin of the coin doesn't really matter since we are dealing with an apparently abundant type of currency, and coins change hands. Especially gold ones.
I consider this one of the strongest visual parallels for anything in the VM, since the Pan figure has the appropriate plant type, including berries, in his hair. The wild, untamed Pans (or Silenos) were always associated with vines, whether they be grape vines or ivy vines. These were considered different versions of the same plant, something which still lives on in the ambiguity of the English word
vine.
First I thought the profile referred to a Bacchus type, but this is less likely. Dionysus usually had a straight nose appropriate to a god, while the VM figure clearly shows Silenos' or Pan's drunkard's nose. The profile is one of a face marked by years of debauchery.
This is Dionysus:
The detail of the VM profile is of such refinement that we can see how the Pan profile comes much closer, even though Dionysus also wears the vine crown.
These figures were extremely popular and of course they survived in other forms of art like statues and mosaics. But the Pan coins are the closest I've found so far.
The problem is, as so often, that the Voynich apparently knows what it's doing with these Greco-Roman figures. To work a Pan/Silenos/old Bacchus face into a vine is clever and appropriate. It's not random.
Also, the face is much more refined than that of other Voynich figures, and it's the only one to appear in full profile. It was copied.