According to Rene Rondeau :
D. Vital was a professor and lecturer in Paris who manufactured phonographs in addition to putting on public exhibitions. Today he is best known for this very small machine, with a base measuring just under 6" x 6" and a mandrel only 2-1/8" wide and 4-1/4" in diameter. it is astonishing that any of these delicate machines have survived the past century and a quarter. Only four original Vital phonographs are known to exist today.
More info on: http://www.edisontinfoil.com