Caviar servers would have a glass liner inside of them. When caviar comes into contact with silver or metal, it will tarnish the silver and develop an undesirable taste.
It could be for jam/jelly and in most instances it would have had a glass liner inside of it because of the acid turning the silver as well (and resulting with pitting over time - that is why you usually see jam/jelly servers having a glass body and silver top. Also, the same story with mustard. They also had dishes for horseradish or other sauces.
So all of the above can apply when a dish/liner is in it (can you see any wear marks from something have been inside or difference in silver color?
It could be a sweetmeat server (notice the handle is in a position to make it a presentor piece - not on the side). Sweetmeats (confections, buttermints) were presented as special treats way back when sugar was more scarce and less affordable. It could also be for sugar.