Low-frequency electrotherapy apparatus with 2 wet

Made:
1850-1880 in France

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Low-frequency electrotherapy apparatus with 2 wet cells, in fine marquetry case, owned by Dr. P.F. Gachet (1858-1909), invented by Drs. Hippolyte Benoist and Marie Davy, French, 1850-1880. Maker's plaque on top of box: 'Appareil Electro-Medical | des docteurs | Hte Benoist and Marie Davy | Pile Brevetee S.G.D.G.'