They were made in 1961 and 20,000 were produced in copper. Most survive in Excellent condition. Most appear as AU or above. In total there were just over 30,000 struck in 1961 from the defaced dies , the 20,000 in copper and the rest in other metals. The dies are now in the Smithsonian someplace:-) They tend to go for between $300.00 and $400.00 each when a slabbed one turns up if they are struck in copper, as this one is.
Thanks,
Bill