Café Royal Cocktail Book by W. J. Tarling (1937, p.121)
| 0.67 part | gin — dry gin | base |
| 2 dashes | lemon juice | base |
| 1 dash | Angostura bitters | bitter |
| 2 dashes | curacao — curaçao | modifier |
| 0.17 part | dry vermouth — French vermouth | modifier |
| 0.17 part | sweet vermouth — Martini sweet vermouth | modifier |
- Shake and strain into a cocktail glass.