Jack's Manual by J. A. Grohusko (1910, p.63)

0.3 portiondry gin base
3 dashesPaychaud's bitters base
0.2 portionsloe gin base
0.3 portionFrench vermouth — French Vermouthmodifier
0.2 portionItalian vermouth — Italian Vermouthmodifier
ice — broken iceother
  1. Shake the Paychaud's bitters, dry gin, Italian vermouth, French vermouth, sloe gin, and broken ice.
  2. Strain and serve.

Ice: Broken ice

See also: Dry Martini Cocktail, Jersey Cocktail