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Nautical antiques/6928-Vintage sextant
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Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
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Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
Nautical antiques/6928-Vintage sextant
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Code 6928
EUR 1000.00
In stock

EUR 1000.00
In stock

used

1626094691Code 6928 Vintage sextantBrass sextant, Russian manufacture No. 3143 from the early 1900s; instrument of fine manufacture. Brass frame with engraved silver protractor scale embedded in the arch, with scale from 0 to + 155, vernier with micrometric screw adjustment, with engraved silver vernier for microscopic reading, wooden handle, four colored glasses for the mirror fixed and three for the mobile one, index mirror and horizon. In excellent condition, fully functional, complete with support base for display. Cm 30x24 h 11 - inches 11.81x9.44 h 4.33.

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.

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Code 6928 Vintage sextant

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