Engine driven automatic mallet set, cased, by J. Steiger & Co. Berlin, Germany, 1920-1935 Engine driven automatic mallet set
Automatic mallet, vulcanite and nickel plated brass, by the S.S. White Dental Manufacturing Co., USA, 1887-1900 Automatic mallet 1887-1900
Engine driven automatic mallet, cased, with accessories, by Weber and Hemmer, Berlin, 1925-1940 Engine driven automatic mallet 1925-1940