I have a double headed 2 1/2 peso coin. I look it up and I don't see the date listed on the coin page. So... since I don't find the date... and it is double sided....I am guessing that it may be a fake? It sure looks real so I am not giving it up. I am very new to coin collecting.... so how to I find out if it is real or not? And if it is real, what the value is? I am including a picture of both sides... though like I said it is double headed, but just in case anyone can help me tell if it is a fake or not.