Information about the identification of silver markings is available on 925-1000.com, RealOrRepro.com and ModernSilver.com. These websites offer visual examples of different silver makers' marks, as well as information about their history and meaning.
Real Or Repro offers information about both American and English silver marks. The silver standard of purity in both countries is 925/1000. This standard has been in place in the United States since the 1860s. Silver pieces marked with the word "sterling" are generally older than those marked with the number 925.
Marks on a piece of silver may indicate that the piece meets the national purity standard. A silver piece may also be marked with other symbols that signify its place of origin and maker.