Brass double-frame sextant. Science Museum Group Collection
![Brass double-frame sextant. Science Museum Group Collection](https://coimages.sciencemuseumgroup.org.uk/332/715/medium_smg00031236.jpg)
Anodized brass sextant, double-frame bridge (straight-bar) type, with polished brass limb and wooden handle, by W Harris and Company, 50 Holborn London, England, 1830-1839. Consists of inlaid 120° silver scale (-5° to 149°) with 10' divisions, gold vernier scale (20") two sets of filter shades (3 & 2, red & green) and reading magnifier on a on a worm screw. Fitted with threaded telescope bracket with collimation correction for two telescopes, 83mm (erect image).
![](https://coimages.sciencemuseumgroup.org.uk/341/320/large_thumbnail_smg00077856.jpg)
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MALL INC. Sextant, Brass Hand-Made 9 Sextant, Nautical Working Sextant, Marine NAVIGATIONAL Ship Instrument
![](https://collections.rmg.co.uk/media/399/845/a6303.jpg)
Double Frame Bridge Sextant
![](https://coimages.sciencemuseumgroup.org.uk/4/455/large_1928_0924_0002_0003__0002_.jpg)
Sextant by Jesse Ramsden with case
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Troughton & Sims Giant Double Frame Brass Sextant
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sextant Auctions Prices
Brass Nautical Lamp Key-ring/Key-Chain.
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NAUTICAL BRASS GIFT SET VINTAGE MARITIME COMPASS/TELESCOPE/SEXTANT W/WOODEN BOX
![](https://theframeblog.files.wordpress.com/2023/06/2-willem-isaacsz-swanenburg-d1612-after-jan-cornelisz-woudanus-hortus-botanicus-in-leiden-1610-etching-leiden-university-libraries-collbn-315-ii-n-41.jpg)
Science, gardens and the Baroque frame
![](https://www.landandseacollection.com/wp-content/uploads/2021/08/is.phpi1159322ampimgTRGHTNFRNTGLY750X542REV.jpg)
Troughton & Sims Giant Double Frame Brass Sextant
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ANTIQUE SEXTANTS, OCTANTS & NAVIGATION INSTRUMENTS by Land And Sea Collection™