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El Vínculo also symbolizes the union between the two Castillas and pays homage to the winery of the grandparents of the current heads of Familia Fernández Rivera.
El Vínculo is the exception of the group, as it is the only non-monovarietal. In addition to Tempranillo, it grows Airén ground, a white grape variety with which Familia Fernández Rivera achieved one of the best whites in Spain.