Shell butter dish and its silver-plated knife

Iconic "shell" butter dish consisting of a shell on silver-plated feet, with a glass insert (in perfect condition), and a silver-plated butter knife. The two silver-plated pieces are engraved "England". There are some marks inside the shell and on the knife (a little extra cleaning may be required). Dimensions: silver-plated shell: 12x14 cm. Length of the butter knife: 14 cm. Very careful shipping.