Stack's 72nd anniversary auction, which was held in the period between October 16 and 17 in the New York City, was proud to offer an 1894-S Barber dime, which was purchased for $1,552,500.

The sold dime is in fact very rare, one of the rarest coins in the United States, being graded PCGS Proof-64. The data from the US Mint shows that only 24 dimes of this kind were struck. According to Stack's catalogers, today only 10 are known.

There were several other coins including a special 1906-D $20, graded PCGS SP-66, which was acquired for $172,500. Stack's catalogues stated that the coin was "one of six special pieces struck on April 2, 1906, the first day of $20 coinage at the new Denver Mint."

"The present coin was that presented to Colorado pioneer Isaac Gotthelf, born in Germany in 1844, who arrived in Colorado in 1866 and formed the town of Saguache in 1873," cataloguers mentioned. "When Colorado achieved statehood in 1876, he was elected to the first state legislature, and was re-elected in 1878. Gotthelf married Florence M. Lot on March 18, 1879, niece of Denver Mint Superintendent Herman Silver. He served as president of the Saguache National Bank, was a member of the firm of Gotthelf & Tarbell (Charles), and was the largest landowner of the county. Isaac Gotthelf died in Saguache on Nov. 10, 1910."

Among other lots there was also a proof Kellogg and Co. $50, dated 1855, Kagin 4, graded PCGS Proof-62, which was bought for $460,000.

"This actual proof specimen was one of the three examples of the 1855 $50 round slug that John Glover Kellogg retained when they were struck and kept with his personal effects," outlined the catalogers.

In addition they mentioned that most likely less than 25 dimes were struck. They also believe 11-13 survive till nowadays.