Welcome to the forum, patrickl. Hope we can help, but I'm afraid the news is likely to be bad.
The "Greek" one is in the name of Agathokles of Bactria, similar to coin number 2 on the
Wildwinds page for this ruler. And yes, Bactria was in the same Afghanistan/Pakistan area.
However, I must ask, what colour metal are your coins? They both look golden-coloured in the pic, but gold coins of Agathokles are either extremely scarce or nonexistent.
The Kushan coin is in the name and pattern of the gold dinar/stater of king Vima Kadphises;
zeno.ru example. However, while the Zeno example is slightly porous, yours is much more so, and your portrait has the typical "half-melted" look I've come to associate with cast replicas.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis