c.1870-1880, in black painted tin plate, unsigned, 56 cm long assembled.

Note: this model is known from contemporary advertisments 'The dipper is the most powerful instrument, best adapted to hear public lectures or sermons and will be found efficient where the smaller-sized ear trumpets have failed. They differ from the ordinary ear trumpet in shape and construction. The mouthpiece is closed by a perforated metal plate. The neck is at a rightangles to it and reaches clear inside, in a curved line, nearly striking the bottom. Air waves passing through the little apertures of the mouth-piece will touch the bottom which, being a form of parabola, reflects them toward a common centre. This common centre is the neck of the instrument. All of the waves being forced into this channel and conducted to the ear, will operate with increased power'