NMM 8292.  Double tremolo harmonica by M. Hohner, Trossingen, after 1904. The Up to Date Siamese Twins model. Metal casings, wood combs. Two brass plates with 14 brass reeds each (28 reeds) per harmonica. According to Hohner's advertising, this ". . . neat and solid combination, is another triumph of the Hohner works. It is far more serviceable than all existing devices for quickly changing from one key to the other. The outer cover forms a sound tube which enables the player to vamp by closing one end with his left hand and maintaining a slight motion over the open end with his right hand. He can therefore produce an endless variety of music, and obtain effects which would be impossible by any other means. The advantage of this system will be readily umderstood and appreciated . . . ." Alan G. Bates Collection, 2000.