Long brass alidade ruler with two alidades (fretted) secured - Lot 131

Lot n° 131
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Estimation :
400 - 600 EUR
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Résultat : 624EUR
Long brass alidade ruler with two alidades (fretted) secured - Lot 131
Long brass alidade ruler with two alidades (fretted) secured by hooks and hinges. The central part of the ruler, which has an opening, features two measurement scales divided into sections of 130 and 120, with 6 and 7 lines. Each side has an opening that allows the instrument to be used as a sight. The center features a brass plate, and the reverse side is left blank. The instrument comes with its original carrying case made of wood covered in studded leather and fastened with two hooks. The engravings and decorations are of fine quality, with asymmetrical openings for the measurements. Probably French in origin—late 17th to early 18th century. L. …. L. 69.5 cm
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