Citrus, floral gin with a slightly sour finish.
The recipe above has been my preferred recipe for some years. However, in early 2020, I decided that...
In my haste to imbibe I used Haymans Old Tom gin rather than a London dry. I think it made for a smoother version. Also agree that a bit of chilled water helps bring out the cocktail.
I used what I could get my hands on: Antica Distilleria Quaglia Violetta Liqueur as Creme de Violette is no where to be found. I added some syrup from Amarena Fabbri. David Selle's comment of adding the violette to the glass first and shaking the rest resulted in a delightful cocktail.
I tried it with both lime and lemon juice and prefer the lime (same with the 20th Century).
I find that shaking this cocktail results in a "cloudy" appearance where the pleasing color of the creme de violette is all but lost, but I don't like it stirred. So I shake the drink minus the creme de violette. Then add it to the glass and pour the shaken ingredients on top. Comes out looking (and tasting) great.