No one knows how an estimated 12 to 20 coins escaped, but a small hoard popped up in Baltimore in the late 1950s. In 2013, Stack’s Bowers Galleries sold a Professional Coin Grading Service Mint State 65 piece for $564,000.
The 1873-CC Seated Liberty, No Arrows quarter dollar is the rarest Carson City Mint coin. In 1873 the Mint increased the weight of quarter dollars from 6.22 grams to 6.25 grams and added arrows beside the date to denote the change. The Carson City Mint had already struck 4,000 lightweight coins when the order came to switch to heavier coins and destroy coins on hand that had been struck to the old standard. Six pieces somehow escaped. In 2012, Stack’s Bowers sold a PCGS MS-64 piece for $460,000.