A vintage cocktail from the 1920s, named for a French fencer who won gold with two different swords at the Olympics in Paris (1924) and Amsterdam (1928), which is credited to a barman at Le Cheval Pie (The Piebald Horse) in Paris, France.
Add ice to a mixing jug.
Add all ingredients to the jug and stir until well-chilled.
Strain into a cocktail or coupe glass.
Garnish with an orange twist.