These two mirror brockages of 1806 Draped Bust Quarters are spectacular and are among the rarest U.S. type errors that I have ever handled. I just purchased these from a old time mint error collection and was very pleased since it took months of negotiations to buy them. PCGS just certified them and I am proud to offer them for sale since they have not been available for decades.
They are unique and the only known brockages in the Bust Quarter Series (1796-1838). These are the earliest known brockages on any U.S. Silver denomination. The obverse brockage was matched to the reverse die of the 1806 B-2. The reverse brockage was matched to the obverse die of the 1806 B-1 (1806/5 overdate).
Fred Weinberg, the mint error authenticator for PCGS, examined and authenticated these two brockages. He stated that "this pair of 1806 Draped Bust Quarters is unique, spectacular, incredible and has not been seen in 25 years."
For comparison purposes, although not in the same class as the two Draped Bust Quarter brockages, the only early U.S. Silver brockage that even comes close is a Cap Bust Dime Brockage that sold for $20,700 in the Bowers and Merena Auction of the Logan Collection. It subsequently graded VG at NGC and is being offered for considerably more. These two brockages are from an early and rarer series, are larger denominations, are graded considerably higher and are unique for the series.
There really is no U.S. early type coin mint error that compares to the rarity, status, importance and excitement of this unique pair of Draped Bust Quarter brockages.