Previously owned. Patina. I was given this about 20 years ago and told it was a working serviceable sextant. That Which could be kept ready in small boats or ships life boat ready for emergency . Not really sure if this an original antique item working and can be used in celestial navigation or a reproduction. Interesting item. A bit too advanced form of navigation for me, being a light dingy sailor. Please see Photos and check this is the item you want in condition you are prepared to accept.