Question: what are pesos made of?
Answer: The 5 and 10 centavos were minted in stainless steel, and the 20 and 50 centavos in aluminum bronze. The nuevo peso denominations were bimetallic, with the 1, 2, and 5 nuevos pesos having aluminum bronze centers and stainless steel rings and the 10, 20, and 50 nuevos pesos having .