Down the Hatch by "Paul" (1920, p.16) — Down the Hatch 1920

1 tspsimple syrup — Natural Syrupbase
3 dropsAngostura bitters — Angostura Bittersbitter
6 dropsPeychaud's bitters — Peyschaud Bittersbitter
0.5 tspcuracao — Curacaiomodifier
1 jiggerItalian vermouth — Italian Vermouthmodifier
  1. Stir well with spoon and strain into a thin glass.

Ice: 0.5 scoop broken ice

This matters because it keeps the standalone sweet-vermouth cocktail branch clearly visible beside the French-vermouth line in 1920.

The mirrored bitters-and-curacao build across French and Italian vermouth is the useful comparative point here.

See also: French Vermouth Cocktail, Vermouth Cocktail