Early in 1915 family moves to Bucharest, where Moritz opens a small printing and bookbinding shop. The following year, when Romania enters World War I, he is conscripted for military service. Rosa and the children move to Buzău, where her parents and Moritz’s live. They return to Bucharest in 1919 when Moritz is demobilized and move to Strada Palas, 4. By the 1920s, Moritz has become a box manufacturer, producing decorative boxes for candy, cosmetics, and other consumer goods.