The tiny mintage of 3,080 business strikes gives an indication of the rarity of this issue in any grade. Garrett and Guth, in their recently released Encyclopedia of U.S. Gold Coins 1795-1933, provide confirmation: 'The 1866 quarter eagle is very rare in Mint State, with very few coins having attained that status. The date was virtually unknown in Uncirculated condition before the last several years. A few coins have since surfaced, but they are rarely offered.'
Description and Analysis courtesy of Heritage Auctions and may not be republished without written permission.