The 1880 Goloid Metric Dollar is a reprisal of William Barber's design of 1878, modified to add a new date, then paired with a reverse from 1879 (Judd 1626). The goloid metal was an alloy patented by Dr. Wheeler W. Hubbell in 1877. Goloid Metric Dollars contain 10% copper, just over 5% gold, and just under 85% silver. This combination brought the coin up to the correct value, but reduced the weight and diameter of the coin compared to standard silver dollars. Additional versions were made in copper (Judd 1652) and aluminum (Judd 1652), most likely for sale to collectors.
Judd 1651 is very scarce, with an estimated survival of approximately 25-35 pieces. The finest example certified by PCGS is an exceptionally colorful PR67, illustated above.