Café Royal Cocktail Book by W. J. Tarling (1937, p.77)
| 1 dash | lemon juice | acid |
| 0.5 part | gin — Booth's gin | base |
| 0.33 part | Pineapple juice | dilution |
| 0.17 part | punch — caloric punch | dilution |
| 1 dash | Grenadine | sweetener |
- Shake.
Devon Gem is Booth's gin, caloric punch, pineapple juice, lemon juice, and grenadine.
Café Royal Cocktail Book by W. J. Tarling (1937, p.77)
| 1 dash | lemon juice | acid |
| 0.5 part | gin — Booth's gin | base |
| 0.33 part | Pineapple juice | dilution |
| 0.17 part | punch — caloric punch | dilution |
| 1 dash | Grenadine | sweetener |
See also: Gem