Here is a Link to the new Hallmarks book: “World Hallmarks, Volume I”  ($228 US)

Note: This is not a book of US trademarks. Hallmarks are not used in the US, which uses only trademarks and fineness marks applied by the maker. Hallmarks are applied by government authorized agencies of various nations. These agencies assay the metal and stamp it with markings to attest to its fineness and the date of assay. They may apply other marks to include the trademark of the maker and/or additional information.