Henry Wilkinson Silver Shell Dish

Hello!  I recently found this piece at a local flea market and am trying to find more information about it and also what an approximate value would be for it.

I researched the initials and markings on the bottom and found it to be from Henry Wilkinson, but I cannot find any similar pieces.  I believe it's silver plated.

Thanks for any insight on my lovely new candy dish :)

Fair