L'Art du Shaker by Dominique Migliorero (1925, p.77)

0.5 partgin — Ginbase
2 dashorange bitters — Orange bittersbase
1 wholeplum in eau-de-vie — Plum in eau-de-viegarnish
0.5 partKina Lillet other
  1. Stir very cold, strain into a cocktail glass, garnish with the plum, and serve.

Garnish: Plum in eau-de-vie

The book says the author invented this in honor of Captain Flores of the 24th B.C.A.