Vega Sicilia is Spain's most well known and prestigious estate. Located in the northerly region of Ribera del Duero, Vega Sicilia produces three wines primarily from the local Tinto Fino (Tempranillo) grape. The estate was founded in 1864 by Don Eloy Lecanda y Chaves, who brought vine cuttings from Bordeaux of Cabernet Sauvignon, Malbec and Merlot to plant alongside Tinto Fino. Vega Sicilia's 3 cuvees include the flagship "Unico", a multi-vintage blend called "Reserva Especial", and younger style Valbuena.

Depending on the vintage, Unico is made from a blend of 80% Tempranillo with the balance of Cabernet Sauvignon and Merlot. Traditionally the wine is aged for ten years in barrel before its release. The Reserva Especial is a blend of top vintages, while the Valbuena is made from younger vines and bottled after five years. A Valbuena cuvee with three years of aging was produced until 1998, but has been discontinued.

The Reserva Especial bottlings contain a unique blend of vintages:

1979 bottling: 1962, 1964, 1968 vintages

1980 bottling: 1960, 1962, 1972 vintages

1990 bottling: 1968, 1970 vintages

1993 bottling: 1970, 1972 vintages

1996 bottling: 1973, 1981 vintages

1997 bottling: 1981, 1986, 1990 vintages

1998 bottling: 1981, 1990 vintages

2000 bottling: 1985, 1990, 1994 vintages

2004 bottling: 1985, 1990, 1991 vintages

2005 bottling: 1985, 1991, 1996 vintages

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