Brown-Forman is to release the third whiskey in its Woodford Reserve Master's Collection series in November.

The 1838 Sweet Mash follows on from the company's Four Grain Bourbon and Sonoma-Cutrer Finish products, and is being released as a limited edition.

It also celebrates the founding year the present-day Woodford Reserve Distillery was constructed and commemorates the "end of the sweet mash Bourbon-making era", the company said today (30 October).

"We believe that this is the first Bourbon of its kind to be bottled in 150 years, or certainly since Prohibition," said Wayne Rose, brand director for Woodford Reserve. "Bottling sweet mash was the original standard for Bourbon production until the sour mash process came along, and Woodford Reserve is honoured to release 1838 Sweet Mash as a tribute to the industry's heritage."

Woodford Reserve 1838 Sweet Mash will be sold in 25 US markets including Arizona, California and Florida. It will also be released for the first time in Canada. Each bottle is individually numbered and 86.4% proof.

Available in major metro markets, only 1,045 cases are available with RSP of US$89.99 for a 750ml bottle.