I found an interesting drink recipe in the Autumn 1937 issue of the Colophon, p. 620:
Tippling subscribers who live in New York may be interested to know that the Restaurant Dubonnet at 5 East 45th St. still serves the Colophon Cocktail, consisting of sherry, rye whiskey, apricot brandy, and Dubonnet. Make mine a blue blazer.
Any guesses about the proportions?