Chill a coupe glass.
Combine the gin, triple sec and lemon juice in a shaker.
Add a dash of Angostura bitters.
Add ice and shake hard for 10–12 seconds.
Fine-strain into the chilled coupe and garnish with a cocktail cherry.
From Harry Craddock's Savoy Cocktail Book, 1930. It is essentially a White Lady with bitters, which sounds like a footnote until you taste them side by side — the dash reframes the whole drink from sweet to composed.
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