Premium Quality 100% Handmade Brass Nautical Sextant. Nautical sextant 3.5"wide, 4.0" long and height is 1.75" Limited functionality - not an actual working device This beautiful nautical sextant made of solid brass with Brass Antiquated Finish. This working sextant instrument is a memorable gift for birthdays, anniversaries, valentine's day, housewarming party, promotion ceremony, baptism, graduation ceremonies, Thanksgiving, Christmas, friendship's day, Easter, engagements, weddings, and corporate functions. This beautifully designed classic brass functional sextant is no less than a piece of art. It enhances your personal vintage, nautical collection. It can be an educational artefact for kids of any age group. It is ideal home décor for adventure, maritime, hiking outdoor enthusiasts and nautical lovers. It is a great instrument for determining the angle between the horizon and a celestial body. It measures the angle between two objects. It has glass optics for a clear view, no plastic lens is used. In navigation, you look at the horizon through this mirror. Although it is not calibrated.