Hallmark identification

Hi, can someone help me to identify the following hallmarks and their meaning. Thanks.

The hallmark is Sheffield 1881. From the left we have:

  • crown: Sheffield Assay Office mark
  • lion passant: English sterling silver standard mark
  • “O”: date letter for 1881
  • Victoria head: duty mark
  • RM over EH in a diamond: maker’s / sponsor’s mark for Martin, Hall & Co (the initials are those of Richard Martin & Ebenezer Hall, the original partners in the company)

Thank you so much silvermakersmarks. You have been very helpful! :slight_smile:

Do you have an idea of the its value (photo attached) or someone who can value it?

I would expect a butter knife like this to sell on the well-known internet auction site for £20-£40.

Thank you very much :slight_smile: