I found this coin in my basement and I don't know what it is or what it's worth. Here is a link because the files were "too big to upload": http://imgur.com/a/zfd81
On the one side you can see an eagle and at the bottom it says "75u". On the other side you can see the two brothers with their names and the date "1963-1968".
It looks like some coins that I saw on the internet but not a single one is actually the same. I tested it and i came to know that it was made of gold.
The coin is 0.86 inch/ 2.2 cm in diameter, 0.04 inch/ 1 mm thick and it wheighs about 0.2 oz/ 5.7 gr. I would really like to know what kind of coin it actually is and what it's worth.
Thanks in advance