Sonoma signature. In 2001, the Sebastiani family set out to build a new wine company in the negociant spirit of the early Sebastiani winemakers. Our partnership with a venerable Sonoma Coast winegrower, as well as other growers throughout the state, makes it possible for us to bottle the highest value wine available in California, vintage after vintage. Made by and for the next generation in wine. From our family's private cellar. 13.9% alcohol by volume.