SquareTrade © AP6.0
* Box Sextant *
This is a solid brass famous Box Sextant, invented in 1803 by instrument maker William Jones. Although mainly used for terrestrial observation, it was also suitable for small ships. French sailor Jean Lancombe used a Box Sextant for his single-handed Atlantic crossing.
The Box Sextant measures 3 inches (7.7 cm) in diameter and weighs just over one pound. The Box Sextant has a brass cover that unthreads and rethreads onto the opposite side where it functions as a holder. The sextant's thickness is only 1 5/8 inches (4 cm) with the cover installed. When the cover is removed, the telescope can be extended and the larger knurled knob can be adjusted to align the images. A magnifier assists in reading the inclination angle from a precision German Silver vernier scale. The smaller knurled knob unscrews for use as a tool to adjust the horizon mirror. The sextant also includes a removable moon filter. The Box Sextant is meticulously crafted and is shipped with the optics properly aligned. This beautiful Box Sextant has a single green moon filter on a swing-arm mount, and is fully functional.
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