First of all it seems that your coin was gold plated in the past times. This is not good for supposed genuine coins! Most of times ''plated'' means fake/counterfeit... but not always...
I think I could identify your coin as ''pirate treasure coin'',which can mean an authentic gold/silver coin or more likely(in your case) a copy/fake or copy for children games. In the web photo I send you,the second(silver) coin is an authentic one,very similar to yours.
Hi Yehia and Andi --
Everything looks suspicious about your coin, Yehia, but it may be real gold, and this would make it very valuable.
Andi has correctly pointed out the "pirate treasure" aspect of your coin. It is a cob coin from the Spanish colony of Colombia. You can see our page on these coins here:
If genuine, it is made of gold. Take it to a jeweler who can non-destructively test it for gold content using an XRF analyzer. If gold, it is a 2 escudos valued on the page above at $800 US dollars. If not gold, it is a fake and worth about zero.
For more detailed information about "pirate treasure" coins like this, see: