细节
A micrometer sextant by Henry Browne & Son Ltd
the brass three circle black crackle finish frame with polished brass arc divided 5°- 0°- 135° and numbered 5659, complete with shades mirrors and telescope in fitted box with test certificate dated 1947, brass handle and securing hooks -- 10½in. (27cm.) square
See illustration
the brass three circle black crackle finish frame with polished brass arc divided 5°- 0°- 135° and numbered 5659, complete with shades mirrors and telescope in fitted box with test certificate dated 1947, brass handle and securing hooks -- 10½in. (27cm.) square
See illustration