Shake gin, lemon, and simple with ice for 10 seconds. Strain into a chilled flute or coupe. Top with sparkling. Stir very gently with a barspoon. Express lemon twist and drop in.
Harry's New York Bar, Paris, 1915. Named for the French 75mm field gun. Sometimes made with cognac (the original argues) — we use gin per modern standard.
Flute or coupe. The sparkling is added last; never shaken into the drink.
Bright, dry, effervescent. Celebratory. The lemon does the lifting.
Costing is directional. Confirm against current beverage grid when invoices update.