The owner says it's authentic, without havibg it certified, and when I asked him how he can be sure, he said that he bought it from a certified coin dealer in the United States who guarantees it's authentic, and with his (the owner's) 20 years of experience he can tell it apart from a fake one. He guarantee's 100% that it's authentic. Of course words like "I'm knowledgable, and a random guy said so" isn't good enough for me. So what I'm wondering is if it's actually authentic and how can one tell?
I only have this picture, which isn't much, but I doubt he would send any pictures, since he thinks I'm an ass who questions his knowledge, and he said that "each one of us will have to learn through experience [smiley face]".