A light pilsner and a dark beer were the first two kinds of beer that were manufactured here. The brewery continued brewing beer even during the Second World War, despite some difficulties. After the war, it was given the status “Official NAAFI Brewery” and was allowed to continue brewing. However, the precious lager was only handed out to members of the allied forces whereas the German people were only given the lesser, light whey beer.

The Brewery expanded their range in 1950: Flensburg Export, Bock Strong beer, Ouick (a fruit juice), Doppelbock and Export Pils. The distribution of the beer was regulated by anti-trust laws. They were allowed to sell their beers from the Danish border to the Kiel Canal, including the North Frisian Islands. Individuals were allowed to bring their own jugs to the brewery and purchase their beer directly but over time this practice was replaced by selling beers in bottles. They used steinie bottles with clip-locks that were sold in wooden boxes of 24 bottles each.

Initiated by Hans Dethleffsen the brewery went through drastic changes in 1974. The company expanded beyond the Kiel Canal and became a well-known brand. The bottle with the clip-locks remained their signature feature. After the release of the “Werner” comic, in which the main character consumes the beer out of the characteristic bottles, the beverage became well known far beyond their previous sales territory and target group.