9-inch Radius Ebony Vernier Sextant by D. McGregor
- Clocks, Watches & Scientific Instruments - 2502
- Date / Time :
- May 01, 2010 10:00AM
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.
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.