David Hall: The 1915 is fairly available in circulated condition, considerably easier to locate than the 1914. In uncirculated condition, the 1914 and 1915 are quite a bit rarer than the Philadelphia Mint Buffalos that follow. In Gem condition, the 1915 is about equal in rarity to the 1914 and it is not quite as rare as the 1921. It is much rarer than the other P-Mint Buffalos. The typical 1915 is very well struck and usually has attractive satin like luster.