Some blends have a very long heritage -- for example, GSM (Grenache, Syrah, Mourvedre), a blend from the Cotes-du-Rhone/Chateauneuf-du-Pape region that goes back at least several centuries. One of the U.S. producers of this style blend is Williamson Wines in Healdsburg; they call it "Enchant Trinity" [vintage year] Red Wine Dry Creek Valley Sonoma County.