Greek. The Greeks refer to Greece as Hellas which, in the Greek alphabet would look similar to this, if I got it right - ΕΛΛΕΗΙΚΑ
50 cents.
This coin is from Greece - what you are reading as "eaahnikh ahmokpatia" is actually the Greek words "ΕΛΛΗΝΙΚΗ ΔΕΜΟΚΡΑΤΙΑ" which are pronounced "(H)ellenik(eh) Democratia" and mean "(the) Greek Democracy". To value the coin, you would need to know its denomination, year and condition.
6€...
$20
Look again. The date says 1776-1976. It's a Bicentennial coin worth 50 cents
It's worth exactly 50 cents.
All of the Bicentennial coins with the dual date of 1776-1976 struck for circulation have face value only regardless of denomination.
The coin must have so much wear you can't see the other date 1976, and it's only worth 50 cents.
All circulating bicentennial Kennedy half dollars are worth 50 cents.
A New Zealand 1976 50 cent coin, uncirculated and in absolute mint condition could fetch up to $5 NZD. There were 2.027 million minted. A reputable coin dealer will be able to give a more accurate valuation. NOTE - All New Zealand pre-2006 50 cent coins are no longer legal tender, but they are redeemable for face value at the Reserve Bank of New Zealand.
More information please - there are seven coins with that lettering on ... 1 drachma 2 drachmes 5 drachmes 10 drachmes 20 drachmes 50 drachmes 100 drachmes The inscription is "ΕΛΛΗΝΙΚΗ ΔΗΜΟΚΡΑΤΙΑ" (Greek Democracy)
No general circulation New Zealand decimal coin contains any silver. New Zealand 50 cent coins were made from a copper nickel alloy from 1967 until 2006.