"Grenet Piles"
Two Grenet batteries dating from the middle of the 19th century. These so-called bottle batteries bear the name of their inventor Eugène Grenet in 1950, capable of supplying 2 volts for about ten hours, used for telegraphy, the medical environment... Two models of different heights and diameters. In very good condition, complete, the glassware has no defects! Large model: height 25 / diameter 13.5cm Small model: height 17.5 / diameter 8.5cm Price for both. 
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