I disagree with the responses above and think the coin looks genuine, though it is a heavily worn and polished jewelry piece. The weird wear pattern and poorly focused photos just make it look fake. It is an 1853 Type 1 gold dollar, not 1863. (An 1863 would be a Type 3 with the Indian Princess portrait.) It has the quirky "slanted 5" seen on many coins of the period. Those were an idiosyncrasy of designer James B. Longacre's work. The 1853 is a common date. Assuming the coin is genuine (and I think it is), the spot (melt) value of a Type 1 gold dollar is worth $76.53 at the time of this typing. Due to the soldering on of the loop and heavy polishing and wear, any numismatic value the coin had is pretty much ruined. However, it retains its gold value and then any value it has as a vintage jewelry item, with the fob. It will forever more trade as a jewelry item for that reason. So figure $75-80 for the coin (at melt price for the gold) plus whatever a jeweler says the fob is worth. It's a handsome piece. Quintessentially Victorian. Won't get much respect as a coin, due to the damage, but it looks like a perfectly fine antique jewelry item. Nice, even.
