The Port Mourant distillery was built in 1732 and closed in 1955. Its double pot still built from Guyanese wood—Chlorocardium Rodiei (Greenheart), generally used for shipbuilding due to its good water resistance, which offers properties similar to copper for purifying sulphur compounds—was moved to Albion when Port Mourant closed, then Uitvlugt, and finally Diamond when Uitvlugt closed in 1999. It is known for producing a heavy, oily rum, bringing lots of relief to the famous navy rums so dear to the Royal Navy.

A Port Mourant 33 year old distilled in 1975 and bottled in 2008. The rum was produced at Uitvlugt with the wooden double pot still from the Port Mourant distillery, which closed in the 1950s. 518 bottles were filled from three casks (mark PM). Velier was founded in Genoa by Casimir Chaix in 1947. It was originally a small, family-run business specializing in the import and distribution of wine and spirits. Luca Gargano, a former representative for Saint James and serious rum collector and enthusiast, bought the business in 1986 and began bottling whisky first in 1992 and then rum in 1996. It was in 1996 that Gargano bottled his first Demerara rums. In 2004, Gargano was invited to Guyana to select casks by his friend Yesu Persaud, then the CEO of Demerara Distillers Limited (DDL). This partnership ended in 2015 when Persaud retired, but the rums bottled in the meantime became legendary.