The Mazola Salad Book copyright 1938 is an interesting die cut book. It features salad recipes that were contributed by leading magazines of the day. There are large photos of salads on almost every page. They were taken from above so you can see the entire salad. This is a recipe from Modern Magazines. The dressing sounds like it might be quite similar to Catalina dressing.

Swiss Salad with Special Dressing
1 bunch watercress
1/2 green pepper, chopped
1 small cucumber, sliced
12 radishes
1/2 cup grated packaged Swiss cheese
Special Dressing
1/2 cup ketchup
1/2 cup Mazola oil
1/4 cup vinegar
Juice of 1 lemon
1 tablespoon finely minced onion
1/2 cup sugar
1 teaspoon salt
1 teaspoon
Mix all ingredients together in a jar that has a tightly fitting cover. Screw cover onto jar, place salad dressing in refrigerator to chill Just before using, shake dressing in jar until ingredients are thoroughly blended.

Wash and pick over watercress. Dry thoroughly. Place watercress in refrigerator until cold and crisp. Just before serving time place watercress in large salad bowl. Add chopped green pepper, cucumber, pared and sliced thin, and thinly sliced radishes. Add Special Dressing. tossing salad lightly in bowl with salad spoon and fork until thoroughly moistened. Grate Swiss Cheese over top of salad using a large grater so the cheese forms into long thin strips. Serve at once.