Victorian christening mug?

Hi. Would very much appreciate help on this one. Picture attached. The hall marks don’t seem to make sense.

The provenance of this family piece I have all ways understood to be Birmingham about 1841.

Have managed to sort a picture out …
rsz_sam_0267.jpg

Your mug is probably late 19th century. The letters are EPGS which stands for ElectroPlated German Silver. German silver was an early term for nickel silver, a base alloy containg no silver. So the only silver content is in the extremely thin plate layer. As EPGS is a generic term used by many electroplaters it is not possible to assign a particular manufacturer to the mug.

Thanks ever so much - thought something wasn’t quite right! Shame, as it’s a fine looking piece.