This is a spoon from Mappin & Webb. Founded in England in 1775, it is a long-established silver manufacturer and is also known as a Royal Warrant holder to the British Royal Family. As you can see in the second and third images, it is unopened, but there is some discoloration due to age. *I think it can regain its original shine if polished. Art Deco decorations are applied to both the front and back, and I think it's very lovely. It seems to be a bit old, as it included a retro Mitsukoshi mark, so I would appreciate it if you could understand.