Your coin looks original, but it's really impossible to know without having a numismatic expert review it in person. There are many copies of these coins out there and a real one could potentially be priceless, but a copy would be only worth a few dollars. I would find a reputable coin dealer and have them review it. In fact I would bring it to a few dealers that you trust to see it in person.
Re: Old coin
Your coin looks original, but it's really impossible to know without having a numismatic expert review it in person. There are many copies of these coins out there and a real one could potentially be priceless, but a copy would be only worth a few dollars. I would find a reputable coin dealer and have them review it. In fact I would bring it to a few dealers that you trust to see it in person.