Due to a Congressional quota, Peace dollar production drastically fell in the mid-1920s. This 1926-S San Francisco issue had a mintage only about 40% of the first S-mintmark production of the series in 1922. Perhaps as few as 75,000 AU or higher grade 1926-S Peace dollars survive today. About Uncirculated is a grade just a trace away from mint-state quality. AU silver dollars boast original mint luster, like Brilliant Uncirculated quality. The main difference between AU and average BU is a bit of wear at the highest points of a coin's engravings.