Since 1897. 50 calories per 1 tbsp. Purely the finest. www.dickinsonsfamily.com. Visit our website for quick, easy recipes & seasonal serving ideas. Marion blackberry preserves. An overnight success - 100 years in the making. For many years, the Dickinson's brand remained a secret, only served in the finest hotels & restaurants. Thanks to delighted guests, the world spread & demand grew. The Dickinson family began offering their specialty preserves to grocers. Today, the Dickinson's brand is one of America's favorite gourmet preserves. Yet our secret to success is the same: Purely the finest. See us online for unique flavors, recipes & offers.