These Sextants are not an antique but we can replicated as same as originals. A great work by Indian artisans. These Sextants are fully functional and made out of brass & polished finish. These Sextants are a reflecting navigation instrument used to measure the angle between any two visible objects. A Sextant can also be used to measure the lunar distance between the moon & another celestial object. People got amazed when they can see this kind of product in this modern era.