Take a small jug according to the ratio of ingredients mentioned above and one by one add each ingredient except for the orange which will be used in the end for garnishing.
Pour sweet vermouth, Campari bitter and gin.
Stir the added ingredients properly in order to combine the flavors.
Then take beautiful cocktail glasses. It would be an ideal choice if you use old fashioned glasses and pour the prepared drink equally in each glass.
Take orange garnish and place it on each glass. Make sure you do not fill the glasses till the top.