An
American ebonite conversation tube wound in silk. The metallic
diaphragm was first patented in 1895 by James Maloney. It is
engraved
on top of the ear piece 'Globe Phone MFG Co Boston'
and this company was in business from 1907 through the 1920s. The
device is unusual in featuring a diaphragm and also because the
earpiece fits over the ear and is held in the hand. In very good condition
and it amplifies
the quietest whisper.
