The 1842-O is an issue which appears to have seen wide commercial use as most are found in well-circulated grades. This is an extremely rare date in Uncirculated with around four or five known. and even properly graded AU55 and AU58 examples are very rare. In fact, I believe that this is among the harder No Motto issues from this mint to find natural color and choice surfaces.
1842-O $10 Gold Liberty
January 8, 2016