David Akers (1975/88): One of the most popular dates in the series, and because of this popularity (due no doubt to its being the last branch mint gold dollar), the 1870-S brings a substantially higher price than many other gold dollars that are actually more rare. Almost all known specimens are either Unc. or AU, except for those that have been mounted and used as jewelry. All of the specimens that I have seen have recutting on the lower curve of the S. I am not sure, however, whether this is diagnostic of all 1870-S gold dollars.
Duckor Family Collection of Gold Dollars - Heritage 8/2015:4271, $37,600