Sax's son, Adolphe Edouard (1859-1945), continued to produce his father's contralto saxhorn model almost without alteration. The only feature that distinguishes this instrument from his father's is that all of Adolphe Edouard's valves are hybrid Berlin/Perinet valves. The bell-forward saxhorn in B-flat, represented here, became the model for the development of the flugelhorn as we know it today.