Impairing current coin and unlawful possession of filings, etc

Every person who unlawfully has in his possession any filing or clipping, or any gold or silver bullion, or any gold or silver in dust, solution or otherwise, which has been produced or obtained by impairing, diminishing or lightening any current coin, knowing that it has been so produced or obtained, shall be guilty of felony and on conviction thereof liable to imprisonment for a term not exceeding seven years.