The information below is primarily excerpted from Pollock and from the August 30, 1993 and September 6, 1993 issues of Coin World by Kenn Henderson. This metallurgical trial was produced by Dupont in 1964. They were one of several companies the U.S. Mint commissioned to find a suitable alloy replacement for silver. This is the Indian obverse design. These were struck in a silver alloy bonded to a copper core. Only 9 examples are believed to have been struck with the following 3 confirmed. 1) Reiver-Heritage 1/06, lot 21898 - NGC63 302674-015 2) Reiver-Heritage 1/06, lot 21899, Heritage 5/08 - NGC64 302674-016 3) Stephen Album's Auction 55, lot 1159, StacksBowers 8/26 - PCGS63 Photo courtesy of Heritage.