GN over RH is Nathan & Hayes of Birmingham and London. The initials are those of the founders of the company, George Nathan and Ridley Hayes. “N” is the date letter for the assay year 1896/97 and the other two marks show that this is Britannia standard silver (.958 as opposed to sterling at .925).
Phil,Is it Birmingham or Chester?
Chester - you were right.
Chester Assay Office was used by a lot of the larger Birmingham companies during a period of about 30 years from 1890 to 1920, or thereabouts, as Chester was able to give a faster turn-around than the somewhat overstretched Birmingham Assay Office.
Phil, your knowledge is unbelievable . I appreciate all your help.