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Lattice frame sextant in mahogany box - late 19th or early 20th century

Lot reference 19105475

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Current bid $243
Next minimum bid $267
Location: Italy
Auction fee: 9% of the winning bid
Shipping to United States: $66.36
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$243 Bidder 8679
16-06-2018 20:33:05
$231 Bidder 4782
16-06-2018 20:31:09
$220 Bidder 1228
16-06-2018 20:28:36
$208 Bidder 4782
16-06-2018 20:25:12
$196 Bidder 0535
16-06-2018 20:21:45
$184 Bidder 4584
16-06-2018 20:04:52
$172 Bidder 1228
16-06-2018 19:21:50

Marine sextant in excellent condition, complete with all the accessories in working order

Marine sextant in excellent condition, with all the accessories in working order, kept in a solid wooden box.
Sextant dimensions: 25 x 22 x 10 cm. Box dimensions: 27 x 25 x 13.5 cm. Please note that this sextant has nothing to do with the many sextants sold on the web at high prices and very low quality.
The operating principle of the sextant: a sextant is an instrument used to measure the angle of an astronomical object above the horizon.

Technically, the measurement is done by collimating the object with the horizon. Angle and time of the measure can be used to calculate a specific position on a map - for example, sighting the sun at noon to estimate the latitude.

The scale of a sextant is 60°, equal to 1/6 of a circle (hence its name), while the octant is a similar device but it has a smaller scale of approximately ​1/8 of a circle, or 45°. This instrument was used until 1767, when the first edition of the Nautical Almanac was published. It reported the astronomical coordinates of the moon, that allowed the navigators of that time to identify the current date according to the angle between the sun and the moon. However, this angle sometimes exceeded 90°, making it impossible to use the octant and smoothing the way for the use of the sextant.

Operating principle

The sextant uses the principle of double reflection: if a light ray undergoes a double reflection on the same plane, the angle of deviation is twice that formed by the reflecting surfaces. The frame of a sextant is actually 60°, but it is graduated in order to read directly twice the angle formed by the two mirrors. The sextant replaced the octant in the second half of the 18th century. Until that time, the octant had been the main navigational instrument. Previously, they used the astrolabe and Jacob’s staff.
The item will be packaged with care and sent by trackable shipping.

It doncharlie48  

Feedback score: 97.2%
Reviews given: 38
Member since: May 25, 2016
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    All is EXCELLENT! Thank you very much!
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    alexborissov July 26, 2018

  • preciso puntuale gentilissimo l'oggetto era come descrizione e in perfetto stato grazie

    user-4bd4c96 July 20, 2018

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    Goed verpakt, snel. Niets op aan te merken
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    Artlover56 June 29, 2018

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    Lot bien emballé et conforme à la description.
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    user-0d4e3be May 22, 2018

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    Oggetti perfettamente corrispondenti all’inserzione, spedizione velocissima, ottimo venditore, grazie!
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    RobertaFabris May 17, 2018

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    veloce e serio
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    mikeletto64 April 4, 2018

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    Perfect, goed verpakt snelle levering.
    product in nieuwstaat
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    bartholdentens1959 March 26, 2018

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    Nella descrizione l'acquirente diceva che l'oggetto era funzionate. Quando è arrivato l'oggetto si accendeva ma è causa della mancanza di un pezzo è inutilizzabile.
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    Matte310 March 10, 2018

    Response by seller
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    L'oggetto e funzionante sei tu che non capisci un cazzo
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    This seller has sold me two scopes. One of the scopes cannot be used and is difunctional. Seller is unreliable and does not want to settle. Never again!
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    R19611961 February 20, 2018

    Response by seller
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    Questo acquirente e senz'altro un personaggio senza capo e senza coda,ma forse mi sbaglio la testa non la ha ma ha la coda del volpino...Crede di fottere un settantenne che vive con le vendite on line,ho già trovato altre volte personaggi disgustosi come questo .....che dopo visionato di persona l'oggetto cercano in tutti i modi di racimolare qualche euro avanzano delle scuse inesistenti,questi, personaggi che nel mio vocabolario o rinominato accattoni e senza scrupoli,che non meritano altro che vengano buttati fuori non solo da Catawiki ma da tutte le vendite on line,ho già pronte delle @mail per farlo fuori da tutti i siti che vendono on line,personaggio sgradevole e assolutamente le viene vietato in futuro di visionare le mie aste e tanto meno fare offerte.stupido nignorante
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    ottimo, preciso, veloce
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    alessandraghidoli February 7, 2018

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    object well described, delivery without problems
    Ok.
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    Paolo-SSQ February 1, 2018

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    CALENDARI
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    TAGLIATUBI January 8, 2018

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    Το προιον ηρθε με σπασμενο το τζαμι και κατεστραμενη η εικονα
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    vasiliki December 23, 2017

    Response by seller
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    il vetro si può sostituire con pochi euro,comunque può sempre rispedirmelo e le renderò quanto ha pagato
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    Ondanks dat de posterijen er wat lang over deden ( kan de verkoper dus niets aan doen ) was alles netjes verpakt en heb ik gekregen waar ik voor betaald heb
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    Jeroenvandervet December 16, 2017

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    product as expected and delivery without any problems
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    fhoogstra November 27, 2017

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    Bien !
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    TOUZET November 23, 2017

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    Degelijke verpakking.
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    Prutskel November 3, 2017

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    Keurig verpakt en snel geleverd
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    stake041 August 30, 2017

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    Schnelle gute Lieferung alles heil angekommen artikel war wie beschrieben
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    Monique74 December 14, 2016

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    Parfait ! Objet bien reçu dans les temps, très bien emballe . Merci
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    martinou August 31, 2016

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    Bien arrivé, bien emballé; dommage pour certaines pièces, qu'elles soient plus endommagées que ce que j'avais cru comprendre; mais c'est ancien et joli donc...
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    Mascot13 August 31, 2016

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    Ottimo venditore
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    sergiosergio2 August 10, 2016

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    heel goed ingepakt en perfect afgeleverd..heel blij met dit mooi stuk
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    chrisbul June 18, 2016

View all 38 reviews

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