Mount Gay Eclipse is the entry-level expression of the world's oldest rum distillery, first created in 1910 to commemorate the predicted eclipse of Halley's Comet — the original 'Eclipse' rum that remains the foundation of the Barbadian portfolio today. The expression blends rums produced in both copper pot stills and continuous column stills at the St. Lucy distillery, using molasses fermented with Mount Gay's proprietary yeast and water from the estate's artesian well. The blend is then aged in American oak barrels before reduction and blending to produce a consistently approachable, fruit-forward, banana and vanilla-noted Bajan rum. Bottled at 37.5% ABV.

Mount Gay Rum is produced in the parish of St. Lucy at the northern tip of Barbados, on the site of what is recognised as the world's oldest continually operating commercial rum distillery — with documentary records dating to 1703. The distillery sits atop Mount Gilboa, drawing water from an on-site artesian well naturally filtered through Barbados's coral limestone. Originally established under the ownership of John Sober, the estate was later renamed in honour of Sir John Gay Alleyne, whose innovations transformed the operation. Mount Gay is the only Barbados plantation distillery to survive continuously to the present day, and remains a benchmark for Bajan rum production.