Cocktails by Pedro Chicote (1928, p.164) — Orange bitters branch

1 copitadry gin base
orange bitters — Source says a few drops.base
  1. Shake and serve in a cocktail glass.

Ice: Cracked ice

This matters because it preserves a very stripped dry-gin club aromatic in the Madrid field.

See also: Gin Cocktail, Martini Cocktail