Kelvin Hughes Brass Sextant This brass sextant comes with an antique finish. This sextant looks like a turn-of-the-century antique. It is engraved with Kelvin Hughes London 1917. The 4-inch (10 cm) radius brass sextant has six filters and a slow motion control to allow fine adjustment of the inclination angle. The sextant measures 4 5/8 inches (11.7 cm) tall, 4 1/2 inches (11.4 cm) wide, 2 1/2 inches (6.4 cm) deep, and weighs (346 grams) If you plan on handling the sextant much, you'll really appreciate how the antique finish does not show fingerprints or require polishing. The sextant is available with a beautiful hardwood storage and display box. Thanks Have a Great Day