185. Irving Cocktail

My interpretation:
  1 oz Aviation American Gin
  0.75 oz Dolin Dry Vermouth
  0.25 oz homemade Calisaya bitter liqueur
  1 slice of orange (for shaker), another for garnish

Fill glass (12 oz) with broken ice, frappé/shake 30 seconds, strain into cocktail glass, garnish with orange slice, serve. — This JM 1908 original, a sort of orange-bitter martini riff, first called for Gordon Dry gin and Chappaz vermouth. The instructions invariably call for the orange slice before adding ice or shaking. I added another slice in the shaker for good measure. Straub picks it up in 1913 and also lists the orange slice before the shake.