Night Watch

This one comes from Jessica Gonzales in the Death & Co Modern Classic Cocktails.

1 1/2 oz Ransom Old Tom Gin

1/2 oz Cruzan Black Strap Rum

3/4 oz Lustau East India Solera Sherry

1 tsp simple syrup

1 dash Angostura bitters

Stir with ice and strain into a coupe.