It is one of the closest beers that mimics the Vienna style, which was really popular and well made in Mexico, but especially well made in years past in Texas. A protege of Dreher, who "invented" the style in Austria settled in Mexico, I believe (I'll have to go look at the book I have on the style) and replicated it with the ingredients he could get locally. The biggest thing to learn from Dreher was the use of the best possible ingredients you could obtain and not skimp to make an extra buck or two.