Gregorian reflection telescope, signed Jean Henry Risler in - Lot 405

Lot n° 405
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Estimation :
400 - 600 EUR
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Result : 1 650EUR
Gregorian reflection telescope, signed Jean Henry Risler in - Lot 405
Gregorian reflection telescope, signed Jean Henry Risler in Mulhouse, 18th century. Brass; length with eyepiece: 30.5 cm; diameter: 4 cm. A good example, complete with its two mirrors and optics, bearing a rare Alsatian signature.
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