This cocktail called for the Booth’s Gin which was historically matured in Sherry casks. The modern version of Booth’s Gin is dry and unaged, which will not produce the same affect.
You can get a similar affect with any gin aged in wine/port barrels.
Shake all ingredients with ice and double strain into a coupe.
Adapted from A Vous Cocktail Guide and Ladies’ Companion (1941)