Hallmarks found in lot of cutlery

Hi guys
Ive found these forks in lots of cutlery i have i think they are silver can anyone comfirm please



They are, indeed, sterling silver. They have a London hallmark with the date letter “k” for the assay year 1865/66 and the maker’s or sponsor’s mark of Chawner & Co. The initials GA are those of the company’s principal, George William Adams.

Phil