The Vesper

Makes 1

3 oz London dry gin

Flemming specified Gordon's, but British Gordon's is not available in the States. The closest would be Tanqueray or Boodles.
1 oz vodka
1/2 oz Kina Lillet aperitif

While Kina Lillet is no longer available Lillet Blanc is nearly the same.
lemon peel, for garnish

Shake in an iced cocktail shaker.
Strain into a stemmed cocktail glass.

A martini glass would be ideal
Twist a large swathe of lemon peel over the surface of the drink and drop it in.

Haigh, Ted. Vintage Spirits and Forgotten Cocktails. Page 276. Beverly, MA: Quarry Books, 2009.