We both have hallmarks registered with Birmingham Assay Office: RS and JC.
Any sterling silver jewellery offered for sale which weighs 7.78 grams or over has to be hallmarked.
The marks we have deep lasered into the silver are: RS or JC sponsor mark; 925 sterling silver; anchor for Birmingham Assay; Lion for British; relevant date letter.
For mixed metal pieces the word 'metal' is shown.
For the lower weight, smaller pendants and earrings we use our 925 stamp.