Small Balbreck graphometer from Paris, 19th century - Lot 15

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Lot n° 15
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Estimation :
250 - 400 EUR
Small Balbreck graphometer from Paris, 19th century - Lot 15
Small Balbreck graphometer from Paris, 19th century A small brass measuring instrument equipped with two fold-up pins, a turned handle, and a sighting mechanism. It bears the engraved inscriptions “Balbreck aîné, 81 rue Montparnasse, Paris” and “Ruby crosshair.” The instrument is preserved in its cylindrical leather case. The lenses are clear, and the mechanism is in working order. Details: Period: 19th century, Origin: France, Manufacturer: Balbreck aîné, Paris, Materials: brass, steel, glass, and leather, Dimensions: 7 × 4.7 cm, Total height: 8.5 cm, Accessory: original leather case, Condition: signs of use and age; still in working order.
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