218 218.


A FINE 12½IN. RADIUS FLAT-FRAME VERNIER SEXTANT BY JESSE RAMSDEN, LONDON, CIRCA 1790


apparently unnumbered, with lacquered-brass ‘T’-frame, signed on the arc Ramsden London, the scale divided -2½°-0°-130°, Vernier with magnifier, braced index arm, adjustable telescope socket, two telescopes, mirrors, six shades, hardwood handle, contained in original fitted mahogany keystone case -- 16 x 17in. (40.5 x 43cm.)


Literature: Mörzer Bruyns: Sextants at Greenwich, Oxford University Press 2009, item 143, p.168.


Provenance: Sotheby’s, 7th October 1994, lot 24. £2500-4000


219.


A FINE 7IN. RADIUS BRIDGE-FRAMED VERNIER SEXTANT BY JESSE RAMSDEN, LONDON, NO. 1226, CIRCA 1794


with lacquered-brass frame signed at the apex Ramsden London and numbered ‘1226’ behind, the inset silvered scale divided to 130°, Vernier with lateral adjusting telescope, bridge-frame supporting adjustable sighting tube socket, mirrors and six shades and threaded hardwood handle, contained in fitted keystone box with tubes -- 10 x 11½in. (25.5 x 29cm.)


£2000-3000


218


219 (detail)


219 (detail) additional images online at www.charlesmillerltd.com


219 81


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