www.antik.it/Nautical-antiques/7433-Antique-Sextant/
1668875343Code 7433 Antique SextantMid 19th century brass English sextant signed Marshall London , instrument complete with three telescopes, one of which is long, and a filter and it is in its original mahogany box with brass hinges, latches and handle. Brass frame with engraved silver goniometric scale embedded in the arch, with scale from 0° to + 150°, adjustable vernier with reading vernier, wood handle, four colored glasses for the fixed mirror and three for the mobile one. Box size 26x24 h 13 cm - 10.2x9.4 h 5.1 inches.
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
Do you provide an authenticity certificate/expertise?
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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Shipping by DHL or UPS is free (but if we are shipping to a country non-EU remember that any taxes and customs duties are on your expense), and items will be sent just after receiving of payment.
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.
Is shipping insured?
Of course! Free insurance by Lloyd's London that covers almost all destinations.
If I change my mind, can I return the item?
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Nautical antiques
Code 7433 Antique Sextant
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