.jpg?w=1)
细节
A mid-late 19th Century 7in. radius vernier sextant by Gray & Keen
the lattive 'A' frame with arc signed Gray & Keen, Strand Canning Dock, Liverpool and inset silvered scale divided 5- 0- 150, vernier with clamp and swivel magnifier, seven shades, two mirrors, telescope and ebony handle with fitted keystone box and accessories
See illustration
the lattive 'A' frame with arc signed Gray & Keen, Strand Canning Dock, Liverpool and inset silvered scale divided 5- 0- 150, vernier with clamp and swivel magnifier, seven shades, two mirrors, telescope and ebony handle with fitted keystone box and accessories
See illustration