Pierre Ferrand Cognac 1840 Original FormulaPierre Ferrand Original Formula 1840 Cognac is a meticulously crafted spirit that aims to recreate the flavor profile of cognacs from the mid 19th century, offering a glimpse into the past through your glass. Interestingly, the creators of this cognac worked with cocktail historian David Wondrich to analyze an authentic bottle of cognac from 1840, using gas chromatography to accurately replicate its composition and taste profile.