Solid Brass Sextant-Nautical Gift-Astrolabe A reproduction of a small lifeboat sextant used for navigation in emergencies. Antique finish 3 inches Miniature Solid Brass Sextant W/Case Perfect for the collector or the beginner interested in learning celestial navigation. Dimensions:10x9x5.5cm Directly from the Manufacturer via Traceable air Courier Service.