This auction is for an 6.25" Spoon of unknown silver content. It is marked with ""Sf" & "13 & D & 1856 in a Wheel" as shown. It measures about 6.25 inches in length and weighs 1.01 oz. troy. It has no monogram.
This is one of a bunch of unknown silver pieces that I have at auction. I believe most of them are solid silver, but I do not have time to research all the different marks.