1 1/2 oz of old overholt rye whiskey (or rye whiskey)
1 1/2 oz of plymouth gin (or Gin)
3/4 oz of noilly prat french vermouth (or orange-flavored vermouth)
3/4 oz of cinzano sweet vermouth (or french vermouth)
Mix ingredients over ice and stir. Strain into cocktail glass and garnish with lemon twist.