The Old Waldorf-Astoria Bar Book by Albert Stevens Crockett (1935, p.71)

0.33 partgin — Plymouth ginbase
1 dashorange bitters base
0.67 partsloe gin base
  1. Build and serve cold.

Café Royal Cocktail Book by W. J. Tarling (1937, p.195)

0.25 partdry vermouth — French Vermouthbase
0.5 partsloe gin — Sloe Ginbase
0.25 partsweet vermouth — Martini Sweet Vermouthmodifier
  1. Stir and strain into cocktail glass.

See also: Sloe Gin Rickey