This “Guess-What Salad” recipe comes from the 1955 Good Housekeeping Cook Book , and just goes to show what wacky recipe ideas one can find in vintage cookbooks.
1 1/2 cups coarsely shredded, pared raw parsnips
3/4 cup diced celery
3 tablesp. minced onion
8 to 10 sliced small stuffed olives
1/2 teasp. salt
Dash pepper
1/4 cup French dressing
Mayonnaise
1 small head [...]

This recipe comes from the 1938 edition of The Mazola Salad Bowl.
1 (13 oz.) can tuna fish
1 cup diced celery
2 tablespoons minced green pepper
1 tablespoon lemon juice
3/4 tablespoon salt
6 tablespoons mayoneaise
1 (No. 2 1/2) can sliced pineapple
Lettuce
Combine all ingredients but pineapple and lettuce. Arrange drained pineapple, one slice on each bed of lettuce; top each [...]

This recipe is from “Things You Should Know About Your New Good Seasons Salad Dressing Kit“. 1955 by the Perkins Products Company.
Ingredients
3 medium potatoes, cooked
1 tbl chopped chives of parsley
1 tbl finely chopped green onions
2 slices crisp bacon, chippedfine
1/3 cup mayonnaise
1/3 cup Good Seasons Old Fashion French Dressing
2 tbl cider or wine vinegar
Peel potatoes while [...]