Café Royal Cocktail Book by W. J. Tarling (1937, p.123)

lemon peel — lemonacid
0.5 partbourbon — Seagram's Bourbonbase
0.25 partdry vermouth — French vermouthmodifier
0.25 partsweet vermouth — Martini sweet vermouthmodifier
  1. Mix.

Invented by Harry Craddock.