Hello micaela
Your hand mirror is a product of
William Hutton & Sons Ltd., Sheffield
(Maker’s mark is here struck upside down). They were registered — as usual also by other companies — in other Assay Offices, like Birmingham, and London.
Maybe the star like mark, left side of maker’s mark, is an indication on place of production?
Birmingham Date letter g (here is the lower part of their cartouche not struck) is 1906/1907; please look here:
http://www.925-1000.com/dlc_birmingham.html
William Hutton & Sons Ltd., Sheffield, made also products in Electro Plated.
Kind regards silverport