329

Circa 1860

EBONY OCTANT

By John Crichton (Glasgow, fl. 1831-1865). Signed "Made for A. Dobbie by Crichton, London and Glasgow". Frame with inlaid ivory scale, which measures an arc of 105 degrees, and a smaller vernier scale on the index arm, making very accurate measurements possible. Also with clamping and a tangent screw for fine adjustments, two sets of filters, a viewing tube for sighting and a handle. Shaped mahogany box with trade label of J.R. Cameron, Liverpool.
Octant length 12". Width 9.5". Box height 5". Width 12". Depth 13".
Condition: This item not available for international delivery. Please be aware of your state and local regulations and bid accordingly.

  • Provenance:
    Sotheby's, London, October 1986.
    The Kelton Collection of Marine Art & Artifacts.

    Notes:
    John Crichton was instrument maker to the East India Company.

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February 24, 2022 9:30 AM EST
East Dennis, MA, US

Eldred's

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