The Old Waldorf-Astoria Bar Book by Albert Stevens Crockett (1935, p.38)

2 dashesorange bitters base
0.5 jiggerWhiskey base
0.5 jiggerdry vermouth — French vermouthmodifier
  1. Stir the orange bitters, French vermouth, whiskey, and ice.
  2. Strain into a cocktail glass and serve.

See also: Beadleston No. 2