I need help identifying these marks of knife

[micaela]

[dognose]

Hi,

That's a silver plater's mark used by James Deakin & Sons of Sheffield.

See: http://www.925-1000.com/silverplate_D.html

Trev.

[micaela]

Is this Silver?

[dognose]

No, it's plated, well that is to say at least the blade is plated. If there are no other marks on the handle, then it's pretty safe to assume that's plated as well.

Trev.