This is a vintage Rogers Nickel Silver Signet pattern solid shell sugar spoon. The spoon is 5 7/8" long. It has a raised oval where a monogram could be placed. I have seen this pattern in an original advertisement for Rogers Nickel Silver dated 1910, so the pattern was made at least that long ago. The silver plating appears to be intact. AVS.
Rogers Nickel Silver Signet Sugar Shell Spoon 1910