The English hallmark consists of  the following: Looking from left to right.

1) The Silversmiths sign are the letters S & P in this case unknown.

2) Sterling sign, the Lion Passant in motion.This is always on an English piece of Silver.

3) The Town sign in this case Chester, is a Weapon with a sword in the middle of three Mushrooms.

4) The Date letter and Frame in this case a G which dates as 1957.

Summary:

This is a hallmark of a piece of sterling silver made in Chester in 1957 by a firm registered under S & P.