antik.it/Nautical-antiques/6818-Vintage-sextant/
1611657411Code 6818 Vintage sextantBrass sextant from the second half of the 19th century, signed Matheson & Co Leith Makers to the Royal Navy complete with lenses and placed in its beautiful original mahogany box with brass hinges and hooks. Flap and vernier mad of silver, wooden handle, 3 colored glasses for the fixed mirror and 4 for the mobile one, two telescopes, a microscope for reading the vernier, graduated from or to 130 °, index and horizon mirror. Box cm 27.5x24.5x13 - inches 10.8x9.6x5.1. Very good condition.
In order to measure a height of a star (for example, the Sun), you have to set the instrument in a vertical plane and, looking through the sight device, to mark out the line of the horizon visible through the non-silvered half of the fixed mirror. Moving the alidade that is together with this mirror, make sure that the light rays coming from the star, and then reflected by the mobile mirror and by the silver half of the fixed mirror, be directed from the fixed mirror to the observer: if you look through the sight device, you see the image of the star, obtained for double reflection, coinciding with the line of the horizon. The height of the star is expressed by the angle whose value is read on the graduated scale. The filter is used when the star is the Sun.
FAQ
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Of course! The legislative decree n. 42/2004 stipulates that who sells works of art or historical and archaeological items has the obligation to deliver to the purchaser the documents attesting to the authenticity of the object, or at least to submit the documents relating to the probable attribution and origin. Antik Arte & Scienza provides an expertise (as warranty) that contains a description, period and assignment or the author, if known, of the item.
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Italy: delivering on the average in 24 h.
Europe: delivering on the average in 2/3 weekdays.
Other countries: delivering on the average in 5 weekdays; custom duties charged to the buyer.
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Nautical antiques
Code 6818 Vintage sextant
Antik Arte & Scienza sas di Daniela Giorgi - via S. Giovanni sul Muro 10 20121 Milan (MI) Italy - +39 0286461448 - info@antik.it - www.antik.it - Monday-Saturday: 10am-7pm
