The Heritage U.S. Coin Signature Auction, held October 18-21 in Dallas, saw over $23 million in sales. The top lot was a 1792 "pattern" (protoype) U.S. "Disme" ten cent piece from the Greensboro Collection, going for $587,500. The coin, graded PR62 by NGC, is believed to be the second or third finest coin of its type known. Struck with a reeded edge as a test of prospective designs for the new U.S. Mint, this coin is certified as a proof, primarily based on strike and surface quality. As a "pattern" coin, it was never meant to be circulated, only to show off a prospective design to officials such as George Washington.