Add 1 slice cucumber and 1 sprig of dill to shaker. Muddle (but do not liquefy) with Maraschino and Falernum. Add gin, Cocchi Americano, lime juice, and 3 dashes of bitters. Add ice and shake 15 seconds. Double strain into two rocks glasses filled with ice, add one dash of bitters, and top with club soda. Garnish with remaining cucumber slice pierced with dill.
Fourth of July and we didn't have all of the ingredients for the "Dillionaire". We had more than plenty of garden fresh cucumbers and some dill, so we improvised a few of the commercially available ingredients and were delighted with the result.