Given that I have never served my guests sardines, I'm not sure I would have a use for a Sardine Fork, although I must admit it is an attractive piece. After some diligent searching I found a description of the need and use of this rather odd piece, and I quote, "The distribution of canned food forever changed cuisine in the U.S. The Midwest, for example, never received seafood until it got a shelf-life. Canned sardines were a huge hit in non-coastal areas and their novelty warranted a new utensil. Seven short tines were just right for stabbing the length of this long but little fish out of its oil." Further research shows perhaps they are more practical and for things other than sardines. They can be used for serving pickled vegetables, anchovies, and petits fours - now there's a variety for you.
Unlike most pieces that are simliar across sterling companies and patterns, this particular piece was all over the map. I found one by International with 6 tines, another with only 5 tines. Old master by Towle had a Sardine Server that was flat with no tines as did Grande Baroque- Continental by Wallace.
(Shown in Orange Blossom by Old Alvin 5 3/8 inches)