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9-inch Radius Ebony Vernier Sextant by D. McGregor

Auction:
2502
Lot:
526
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Auction:
Clocks, Watches & Scientific Instruments - 2502
Location:
Marlborough
Date / Time :
May 01, 2010 10:00AM

Description:

9-inch Radius Ebony Vernier Sextant by D. McGregor, Greenock, with bone scale divided 0-105, brass index arm with vernier, thumbscrew lock and fine adjustment, mirror and colored filters, 3 3/8 in. brass tube monocular, bone maker's plaque marked in block lettering D. McGregor. Greenock and in script J. McKenzie Greenock, turned wooden handle.
Estimate $350-550

lacking a 2 1/4 in. segment of bone scale, 1/4 in. segment of vernier scale, ebony radius arm broken, reglued and backed with brass, front feet are replacements made of threaded brass wire.

Keywords

Ebony Vernier Sextant, Bone, Brass instrument, Celestial navigation, Sextant, Vernier scale