The gold jewelery maker's marks are also known as hallmark.They are official marks struck on items made of precious metals.They represent the brand name but not the quality.
A jewelry Maker's mark is simply the brand name which the company uses. Catagorized to ensure true antique Authenticity. It does not express the quality of the gold jewelry.
Maker's marks are used to confirm gold content and workmanship, and are most often registered with the local government, like any trademark would be. It's a signature.