A brass surveying circle with two telescopes signed “Rochette Quai de l’Horloge à Paris”. The instrument was made by Gaspard Rochette who was active on Quai de l’Horloge from 1794 to his death in 1846. We more commonly find the signature of his son Jean Rochette who signs “Rochette jeune”.
Both telescopes measure 29.5cm in length and the main circle 23.5cm in diameter.
It is divided into 360th degrees on a silver limb and features a micrometric adjustment.
The second telescope has also two micrometric adjustments and the whole thing is mounted on a circle placed on three calente screws.
Perfect working condition and fine comestical condition.
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Established by Alexandre Piffault in 2014 and based in Paris at 5 rue de Condé, 75006, very close to Odéon, Le Zograscope specializes in antique and rare books in Science, Medicine and Technology, and rare antique instruments in the same fields. We have especially a strong interest in early and continental microscopy, early and special mathematical/drawing instruments, medical and surgical instrument, and rare technology.
Personnal website : https://www.lezograscope.com/