an unusual inverted London dome, American, c.1880s, in nickel plate, with plaque 'EARPHONE PAT’D USA MAY 4 1880 PAT’D CANADA MARCH 11 1881 S. NORTH SYRACUSE NY'. Also marked 2 and 839., double mesh grille 9cm high; a tinplate telescopic ear trumpet, American, in six sections, stamped 'PATENT MAY 12 1903' 30.5cm extended; with a Bonnafont trumpet, c.1860-1880, black painted tin plate, 9.5cm (3)