That coin is an image by one artist, of one individual (if it was even modeled on a real person). And not conclusive in any case.
And of course "largely Caucasian" means what? What does "largely" mean there? I would normally take "largely" in such a usage to mean "predominantly". Or at least "constituting a large part of".
I doubt it, but I'd like to know on what basis the statement was made.