細節
A rare double drum sextant signed Cary, London
constructed in brass the case inscribed Capt. George's R.N. and further inscribed Registered Double Sextant No. 53, the silvered scales divided 5°- 0°- 165°, verniers with fine screw adjustment and magnifiers, telescope with rotating shade attachment by eye piece with light slide to right, folding mahogany handle and pin foot -- 9¼in. (23.5cm.)
See illustration
constructed in brass the case inscribed Capt. George's R.N. and further inscribed Registered Double Sextant No. 53, the silvered scales divided 5°- 0°- 165°, verniers with fine screw adjustment and magnifiers, telescope with rotating shade attachment by eye piece with light slide to right, folding mahogany handle and pin foot -- 9¼in. (23.5cm.)
See illustration