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| #2418 | Antique french barometer signed P. Roulot, 33 Boulevard Hausmann, Paris | |
| Antique french barometer signed P. Roulot, 33 Boulevard Hausmann, Paris.
Rosewood veneered and silvered brass hand engraved plate. Large glass disk mercury reservoir. Adjustable scales for use on sea-level and in the high lands. |
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