Famous New Orleans Drinks and How to Mix 'Em by Stanley Clisby Arthur (1938, p.39)

0.33 jiggergin — Ginbase
0.33 jiggerOjen — Ojenbase
0.33 jiggerFrench vermouth modifier
  1. Pour the ingredients into a bar glass filled with ice, jiggle until well frappéed, strain into a cold cocktail glass, and serve.

Arthur says Fernandez & Co. of Jerez featured this as an ojen cocktail.