Antique Sextant, Bell frame by J. Parkes & Sons, Liverpool.
Antique Sextant by J. Parkes & Sons, Liverpool.
A fine late 19th century navigators Sextant, brass 'Bell pattern' frame design. Engraved on the arc J. Parkes & Sons, Liverpool.
The silver scale is engraved from -5 degrees to 155 degrees and can measure angles up to 129 degrees, it is divided into 10 minute increments. The index arm has swinging scale magnifier, the silver Vernier scale reads from 0 to 10 seconds of arc. 7 inch radius.
This rare Sextant has a universal rack and pinion focusing object lens that comes with three interchangeable eye pieces.
It is contained within its original hardwood box that has a patent push button release mechanism and brass carry handle. It is also complete with all its accessories - two eye piece sun filters, mirror adjusting tool, screwdriver and key to the box lock. It also has a Patent greatest angle clamp.