El Bar Americano en España by Pedro Chicote (1927, p.69)

0.5 copitacoñac base
ice — Unos pedacitos de hielobase
2 coffee spoonbenedictino modifier
1 coffee spooncuracao modifier
1 coffee spoonvermut italiano modifier
  1. Agítese muy bien y sírvase en copa de cocktail.

Ice: Ice

Cocktails by Pedro Chicote (1928, p.210) — Benedictine and curacao

0.5 copitacognac — Coñacbase
1 coffee spooncuracao base
2 coffee spoonsBenedictine — Benedictinomodifier
1 coffee spoonsweet vermouth — Vermut italianomodifier
  1. Shake very well and serve in a cocktail glass.

Ice: Ice pieces

This matters because it preserves a late Madrid cognac after-dinner aromatic with Benedictine and curacao rather than a simpler brandy-liqueur build.

See also: Cointreau Cocktail, Martini Cocktail