This promo recipe from Guy’s peanuts was clipped from a newspaper and found in a large collection, date unknown. I’ve typed it below along with a scanned copy.

GUY’S OLD-FASHIONED PEANUT BRITTLE
Makes about 2 pounds

2 cups sugar
1 cup light corn syrup
1/2 cup water
1 (10-ounce) package Guy’s Raw Spanish Peanuts
1 tablespoon margarine or butter
1 teaspoon baking soda
1 teaspoon vanilla extract
1/8 teaspoon salt

In 3-quart heavy saucepan, combine sugar, syrup and water. Over medium heat, cook and stir until sugar dissolves. Cover; cook 3 minutes. Remove cover; cook to soft ball stage (234°). Add peanuts. Continue cooking, stirring frequently, to hard-crack stage (300°). Remove from heat. Stir in remaining ingredients. Spread onto two large well-buttered baking sheets. As candy starts to cool, lift up and pull edges gently to stretch candy thin. Break into pieces when cooled completely.