The other marks complement the responsibility mark. A control mark records official inspection, a fineness mark states the precious-metal content, and a year mark identifies the year in which the object was marked.
Identification works best when you examine the complete set of marks. Begin with the mark you recognise most easily—such as a crown, fineness number or letter–number combination—and then compare the other marks in the sequence.
Search for a responsibility mark by its letters or find makers associated with a particular location. You can use either field or complete both.
How to get better search results
If the holder of a responsibility mark is not found, try searching by location only. Results also include makers whose mark has not yet been identified with certainty.
For a Symbol Mark or Signature Mark, enter the Symbol Mark number or Signature Mark search code in the mark field. The codes are available in the Symbol Marks and Signature Marks sections above.
Letters in old marks can resemble one another. If necessary, try alternatives such as I and J, or C and G.
Enter the letters together without full stops or spaces: A:PIHRA → APIHRA, C:G:N → CGN and C.F. ELG → CFELG. The characters /, & and – may form part of a mark.
Control marks Compare the alderman's zigzag, crowns, and import, export and CCM marks. 
Fineness marks Identify marks showing the fineness of gold, silver, platinum and palladium. 
Year marks Convert a letter or letter–number combination into the year the object was marked. 
Other marks Explore rare, unusual and unofficial marks.