Nautical Antiques & Marine Art at Land and Sea Collection™ Dive Helmets, Ship Models, Sextants

EARLY SPENCER BROWNING RUST OCTANT

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This Fine Octant Has Been Sold. Thank You!
See our current inventory of Antique sextants and ocatants here http://www.landandseacollection.com/id320.html
 
FINE QUALITY EARLY SPENCER~BROWNING~RUST OCTANT Ca 1775
PRESENTED is a fine early 19th C. mariner's sextant with ebony frame. ivory graduated arc and vernier, and bronze fittings. The arc measures from - 5 to plus 95 degrees. In the center of the ivory degree's scale between 50 and 55 degrees is inscribed in script "SBR" identifying this instrument as that of Spencer, Browning & Rust, of London even though the name plate on the crossbar is missing. This beautifully made instrument has a brass index arm measuring a long 13 7/8 inches. The top horizon mirror is on an adjustable turntable and can be rotated by by loosening a screw which locks the mirror's position. The lower mirror and peep sight are used for taking back sights, and were only fitted to very early octants. Note the early form ivory vernier scale, reading from right to left from 0 to 20 arc minutes, two hole peep sight with "flap", and moveable three sun shade which serve both mirrors on the frame. All of these features date the instrument before the turn of the 19th century, likely Ca 1775. See Peter Ifland's comprehensive sextant work, "Taking the Stars". particularly figure 65, page 58.

Some time after 1780, the addition of a tangent screw, not on this instrument, allowed for fine adjustment and represented one of the two major changes in the basic operation of the octants and sextants for the next 150 years! The second was the fitting of telescopes. As was the practice with octant's of this larger size, only peep sights were fitted. Later a handle was added. All of these tell tales indicate it is one of the earliest of that type made by Spencer Browning making it a noteworthy instrument by this maker.

                        Maker's Initials
                    The three mirrors

            Reverse          

CONDITION: The instrument, its ivory name and graduated arc, and its hardware are all in remarkably good condition, with a nice patina of age and the octant is in exceptional quality overall. All three bronze legs are present. Missing is a small ivory scribe, and inlaid ivory plate on from the cross bar. The three mirrors show wear and age as would be expected with the passing of over 200 years. If desired, resilvering is inexpensive and available through most mirror shops.

All in all, a highly desirable and worthwhile example from one of the better known English instrument makers.

DIMENSIONS: 

  • Arc reads - 5 to +95 degrees
  • Length of frame 13 7/8"
  • Width of frame at arc   11 1/2"
  • Index mirror 50 x 31 mm
  • Horizon mirror 24 x 20 mm
  • Back sight Mirror 24 x 20 mm
  • Three shade glasses
  • Two Peep sights
  • Weight    2 Lbs2 oz

International buyers welcome, but inquire first.  We have satisfied customers in Australia, Austria, Belgium, Bermuda, Canada, Chile, Denmark, England, France, Germany, Holland, Israel, Ireland, Italy, Japan, Kuwait, Mexico, New Zealand, Norway, Nova Scotia, Saudi Arabia, Scotland, Singapore, Spain, Sweden, Thailand, USVI and the Eastern Caribbean.

OUR UNCONDITIONAL GUARANTEE: If not completely satisfied with your purchase it may be returned, if without damage, within three days of receipt in its original condition and packaging. Returns must be insured for their full value. All that is required is a prior email authorization by us for the return. Unfortunately, no refund can be made for the cost of shipping, packaging and handling.

Buy this very special article of maritime history Now!   What a great find for that special person who can appreciate only the finest and most unusual.

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