I honestly cannot tell any difference, short of the name, between the Old Style Salad Fork and the regular Salad Fork. Some of the old style have three tines, some have four. The length is comparable. They are not found in many patterns. Old Newbury by Towle actually has two sizes of the Old Style Salad fork (go figure). Whatever the case, here are some examples. Old Colonial by Towle (6 3/8 inches)
Although I have posted two other times on this piece, the Pea Server is unique in that the design of the bowl itself is a little different in each pattern, making it a very interesting piece. Also, it is found in most sterling patterns.
Blossom was introduced by Dominick and Haff in 1905. A beautiful ornate pattern with a flower motif on the terminal, flowers and leaves on the stem, and various floral decorations on the shoulders on the different pieces. Some of the serving pieces are particularly lovely. The lettuce fork is one of my favorites.