/PRNewswire/ - The Duncan Family, owners of Silver Oak and Twomey Cellars, are pleased to announce the acquisition of Sausal Vineyard and Winery, one of the Alexander Valley's oldest and most admired boutique wineries and vineyard sites. Sausal Vineyards was acquired by the Demostene family in 1956. They planted additional vineyards and built the winery in 1973, where they crushed their first grapes. Proud of their Italian origins, the vineyard is planted primarily to Zinfandel, as well as other varietals. There are Zinfandel blocks boasting vines that are up to 130 years old.