Café Royal Cocktail Book by W. J. Tarling (1937, p.106)
| 0.33 part | gin | base |
| 0.33 part | Dubonnet | modifier |
| 0.33 part | sweet vermouth — Martini sweet vermouth | modifier |
- Mix.
Hart is gin, Dubonnet, and sweet Martini vermouth.
Café Royal Cocktail Book by W. J. Tarling (1937, p.106)
| 0.33 part | gin | base |
| 0.33 part | Dubonnet | modifier |
| 0.33 part | sweet vermouth — Martini sweet vermouth | modifier |
See also: Heart