The “Riserve” are the most exclusive of the Giusti collection and is produced each year in extremely limited quantities, extracted from some precious series of barrels in production since 1700. One of these barrels, coded as A3, was brought by Giusti to the National Fair of Florence in 1861, where a “vinegar of 90 years” was awarded a gold medal, successfully repeated at Expo in Paris in 1889.