The Morgan Dollar, designed by George T. Morgan, was minted from 1878 to 1904 and for one final year in 1921. This collection of final year of issue Morgan Dollars includes  examples struck at the Philadelphia Mint, San Francisco Mint, and the Denver Mint all graded in Mint State 64 condition.  As both the final year of issue and the only Morgan Dollar ever struck at the Denver Mint, the 1921-D is prized by collectors.  1921 stands out as a particularly interesting year for the Morgan Dollar due to its use of the micro-mintmark. The ''S'' and ''D'' micro-mintmarks used on these issues are significantly smaller than ever used on previous Morgan Dollars, making them unique one year only varieties.  All three of these 1921 Morgan Dollars have MS64 populations significantly less than 1% of their mintages,  making  each of them a Condition Rarity.