Composite instrument from the end of the 19th century. - Lot 240

Lot 240
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Estimation :
1200 - 1500 EUR
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Result : 3 000EUR
Composite instrument from the end of the 19th century. - Lot 240
Composite instrument from the end of the 19th century. Rectangular plate in gilded brass with a circle of degrees on the obverse. They are numbered from 1 to 60 and grouped by six around a stereographic projection: arcs of several horizons between 20° and 50°. The circle is engraved with a zodiac in the center which seems to be later. The reverse side is engraved with a trigonometric quarter circle on a base of thirty. At the top is a hole for attaching a plumb bob. 22.8cm x 16.8cm.
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