The Old Waldorf-Astoria Bar Book by Albert Stevens Crockett (1935, p.44)

0.5 partgin — Plymouth ginbase
2 dashesorange bitters base
2 slicesOrange peel garnish
0.5 partsweet vermouth — Italian vermouthmodifier
  1. Build the orange bitters, gin, and vermouth over ice.
  2. Add orange peel and serve.

See also: Adonis