This is one of three known U.S. or World coins that were struck by either two obverse or two reverse dies and struck on an off-metal planchet. It is a Chile 10 Pesos struck with two obverse dies on a magnetic copper plated steel planchet and weighs 2.22 grams. A normal 10 Pesos for this design is struck on an Aluminum-Bronze planchet.
This off-metal planchet can be traced to 1997 when for one year only the Bolivian 10 Centavos coin was struck on a copper plated planchet having a weight of 2.23 grams. The Santiago Mint in Chile strikes coins for a number of countries including Bolivia.
Two other unique coins are known to have been struck by either two obverse or two reverse dies on an off-metal planchet. The first is a unique two headed 1971 Great Britain ˝ pence struck with two obverse dies on a nickel copper planchet and is certified by NGC. The other is a two tailed 2003 5 Pesos from Chile struck with two reverse dies on a 1 peso nickel brass planchet and is certified by PCGS.
With this two headed off-metal 10 Pesos from Chile becoming only the third known off metal struck by either two obverse or two reverse dies, it will be certified and authenticated by one of the major grading companies in the near future.