Prior to the introduction of the Sikes hydrometer, in 1816 the ship's Purser or "Pusser" tested the strength of the daily issue by mixing neat rum with a little water, to which was added a few gunpowder grains. If, when the mixture was heated through a burning glass the gunpowder ignited, the rum was served at "proof". When the method was tested by hydrometer, it was found to be 109 proof (54.5% ABV)
This superb rum has been chill filtered and aged a minimum of three years in once used charred oak bourbon barrels and further enhanced with a unique blend of caribbean spices.