Dos Equis is a lager that was originally brewed by the German-born Mexican brewer Wilhelm Hasse in 1894. The brand was named Siglo XX ("20th century") to commemorate the arrival of the new century, and the bottles were marked with the Roman numeral for 20 ("XX"), thus "Dos Equis" which is Spanish for "two Xs". The main brand Dos Equis XX Special Lager is a 4.45% abv pale lager sold in green bottles. Dos Equis XX Amber is a 4.7% Vienna-style amber lager sold in brown bottles, and was first exported to the United States in 1973.