Good call RC... i for one have never encountered one of these before.Welcome to Tnet.
I have significant doubts, I'm afraid. There are numerous fakes of these coins. A genuine one should weigh 7.97g but fakes are also made to match that weight. Below is a genuine example alongside one of the many fakes, with yours above. There are many varieties of fake which usually have differences in detail from genuine coins but note in particular: the positions of the stars at the tips of the eagle feathers and the alignment of the scrollwork relative to the 'M' of 'MARK'.
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If it is fake it might still be gold, but more likely gold clad onto a tungsten core (if the weight is correct).
...are numerous fakes of these coin...