What a find! This variety was created when an overzealous mint employee polished the dies so much that he or she obliterated the feather closest to the Indian’s neck thus creating the 2 feather variety. This variety does occur on several dates of Buffalo nickels with varying degrees of rarity. The 1918 appears to be the key rarity for this variety with only a total of 22 coins graded in all grades by PCGS with only two uncirculated coins, this one in MS-63 and one in MS-64. CAC has only stickered this coin and not the MS-64.
The MS-64 was auctioned during the FUN show in January of 2014 and was bought back by the consignor for almost $13,000! This coin is certainly a very good value at $5950.