The American Model K was discontinued in the wake of the Great Depression in 1930, but the Hamburg factory continued making the model, although by the 1930s the term "Vertegrand" had disappeared from the casting of the iron frames of the Hamburg pianos and was replaced by the hand-painted comment "Erzeugnis der Steinway-Werke Hamburg-Altona", which translates to "Product of the Steinway Factory in Hamburg-Altona." Production continued in Hamburg until the Hamburg Steinway factory was seized for war-related production around the time of the Allied firebombing in 1943, which destroyed all of the factory's records.