Recipes for Mixed Drinks by Hugo R. Ensslin (1917, p.22) — Ensslin 1917

0.5 drinkCuban rum — Cuban Rumbase
0.5 drinkItalian vermouth — Italian Vermouthbase
  1. Shake well in a mixing glass with cracked ice.
  2. Strain and serve.

Ice: Cracked ice

This matters because it keeps the tiny rum-and-vermouth aperitif field visible beside the better-known Palmetto and President-style lines.

Its small two-part structure shows how minimal some pre-war named cocktails could be while still remaining distinct.

Café Royal Cocktail Book by W. J. Tarling (1937, p.134)

0.5 partrum — Daiquiri rumbase
0.5 partsweet vermouth — Martini sweet vermouthbase
  1. Mix and strain into a cocktail glass.

See also: Palmetto Cocktail, Bamboo Cocktail