According to the novels, this is the correct way to make a 007 Martini.

3 oz gin
1 oz vodka
1/2 oz Lillet Blanc wine

Pour the gin, vodka and Lillet blanc into a cocktail shaker half-filled with cracked ice. Shaken not stirred, and strain into a chilled cocktail glass. Garnish with a twist of lemon, and serve.