Millstream Brewing 1923 is a Kolsch by style. This brew pays homage to our neighbors at the Woolen Mill. In 1923 a fire destroyed most of the Mill, but in the true Amana spirit, everyone came together to help and rebuild. 1923 Kolsch is light enough to drink in the warmer months and hearty enough for the cooler months.. This craft beer is 4.8% ABV and 21 IBUs. In this craft beer review, we will take a look at the color, smell, and taste.