Philippi and Jorge Claussen. Applying a formula used by cloistered monks in Germany and Czechoslovakia, they started producing 175,000 liters a month. Just past the century's halfway point, in 1954, the Modelo group from Monterrey acquired the brewery. This was a boon to the beer-drinking public since Modelo had the money to modernize the local plant and maintain its quality standards. In fact, Pacifico has received two important forms of recognition, the right to label its product with the international quality assurance code of ISO-9002, and also a national certification as a "clean industry." The brewery also has opened a museum displaying the utensils and equipment used in the making of the city's most famous brand of suds, along with historic photographs of the founding fathers and the early-day procedures used in the beer's manufacture. Officials of Pacifico say they export their brew all over the world, even to Australia. They're also exporting to South America, where it ranks right up there with Brazilian beer in popularity with consumers.