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| #4449 | Electrical chronometer from Professor Jacques Arsène d'Arsonval d'Arsonval, made by Charles Verdin. | |
| SOLD | Electrical chronometer from professor Jacques Arsène d'Arsonval used to measure the response time of nervous impressions. Constructed by Charles Versin, 7 Rue Linné, Paris en 1890.
In good working condition. |
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| YouTube movie: | https://www.youtube.com/watch?v=k-QY8dFcyNU |
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