45ml Gin, 22ml Red Vermouth, 22ml Green Chartreuse, Orange Bitters, Lemon twist, Cherry (or Olive)
Originally 1890s, 25ml equal quantities. This is the Dale Degrof re-invention. The Ethicurean (now closed) added muddle rosemary and a sprig as garnish.
Then there's the Dead Rabbit version. 45ml Gin, 45ml Red Vermouth, 15ml Green Chartreuse, 2 dash Orange Bitters, 2 dash angostura, 2 dash Absinthe, Orange peel.
Rather than throwing off the ratios so much it ups the ABV with Navy strength gin, then dries it out a bit with the mix of vermouths. This is my favorite version I’ve found.