A person who makes, mixes, or changes a metal in imitation of gold or silver, or teaches a person the art of making, mixing, or changing a metal in imitation of gold or silver, with intent that the same shall be used for coining, shall be imprisoned not more than 10 years and fined not more than $500.00, or both. (Amended 1971, No. 199 (Adj. Sess.), § 15; 1981, No. 223 (Adj. Sess.), § 23.)