Gosling's Bermuda Black Rum 151 Proof. Since 1806. Official rum. Black seal. 750 ml. Rich, smooth & full-bodied, black seal rum is a unique blend by Gosling Brothers of Bermuda, the original recipe being a closely guarded family secret that has been handed down over many generations. Originally called "old rum" it was available only on draught out of oak barrels. Finally, after world war one, black seal was sold in champagne bottles, the most widely available bottle at the time. The cork was sealed with black sealing wax, hence the name black seal. Dark 'N Stormy, Goslings Black Seal Rum and device are registered trademarks of Gosling Brothers Limited, Hamilton, Bermuda. www.blackseal.com.