Maybe 1935 Peace dollar - last one made in US Maybe Panamanian Balboa - same weight and purity of US dollar and piece of 8. cements the historical importance and influence of the piece of 8
Got the bullion version of this, surprisingly low mintage of 50,000. The first bi-metallic coin to be widely used in the 20th century is the 500 Lira issued by the Italian government in 1982. http://www.wcoins.com/Coins-Bimetal.htm What about the 2002 Commonwealth Games trimetallic, is that the world's first?