Scotchtalk

John Hansell has posted a press release with the details:

The First Growth series comprises of  6 limited edition Cuvées – labelled A to F. Each is a 16 year old Bruichladdich, American oak matured, with an additional cask evolution in French oak casks from each of the 1855 first growth chateaux, including Sauternes. UK Retail Price: +/- £40.

The release goes on the explain the unique character of the Bordeaux casks:

The famous 1855 Classification of Bordeaux rated chateaux into 5 groups according to quality and price of their wines. The First Growths were the best.

Today these legendary estates use casks coopered from the finest French oak, 150 to 200 year old trees from the forests of Tronçais, Allier and Vosges.

Costing up to four times more than an American oak equivalent, the flavour-rich oak staves are weathered outside for 4 years for extra finesse.