The Tamaya sextants from Japan have long been popular among merchant mariners around the world. They are unique in that their construction combines the lighter weight of an aluminum frame with the slightly higher accuracy of a bronze arc (the best of both worlds). Two models are available: the Spica (MS-733), and the Jupiter (MS-833). The Jupiter is easily the most popular of the two due to its much lower price, while having practically the same specifications and construction. The Spica and the Jupiter are both full sized sextants and are supplied with traditional horizon mirrors, a standard 3.5 x 40 scope, electric lighting, and comes in a molded plastic case with slide locks.