Silver Pillbox - can't identify marks to value

Hi

I’ve had trouble identifying the hallmarks on an old silver pillbox I was given a while ago. If anyone can help me with age, origin and value I would be very grateful!

Thank you in advance.

(The file showing the top of the box wouldn’t load - too large? - I’ll try to take another and repost. The hallmark ones are the clearest I could get.
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This is a Birmingham hallmark with what I think is the date letter y for 1898. HM is Henry Matthews. For value I suggest you have a look at completed auctions on Ebay to get an idea of of what people are willing to pay - you probably won’t of course find one exactly the same as yours but I’m sure you will find something sufficiently similar in size and age.