Help with marks on cigarette case c1918

T&S is E J Trevitt & Sons, manufacturing silversmiths, of Birmingham. The hallmark is Chester 1916/17.

Phil

Thank you Phil - do the marks indicate whether it is Stirling Silver or silver plate?

It’s sterling (.925). The lion passant is the guarantee of the standard.

Many thanks - you have been a great help and it is much appreciated. Kind regards from Down Under