Duckhorn and Calera have been setting the stardard for American fine wines for over 40 years. Dan and Margaret Duckhorn founded Duckhorn Vineyards in 1976 and have been crafting classic, highly rated Napa Valley Cabernet Sauvignon, Merlot, Sauvignon Blanc and Chardonnay, since their inaugural vintage of 800 cases. In 1975, Josh Jensen founded Calera in the Gavilan…