This is a full-sized solid brass sextant with an antique patina finish. It features adjustable mirrors and four swing-arm filters in heavy mounts. The Rack and Pinion design has an adjustment knob that drives a pinion gear against machined teeth on the limb of the sextant to allow fine adjustment of the inclination angle. A built-in magnifier can be swung into position to assist in reading the German Silver vernier scale. The index mirror can be adjusted using a convenient brass knurled screw on the top of the sextant, and the horizon mirror has a thumbscrew adjustment on the back of the sextant. The sextant measures 8" tall, 8.25" wide, 3.75" deep, and weighs 3 lbs. The sextant comes with a beautiful velvet lined hardwood storage and display box that has fitted cut-outs to securely hold the sextant. The case measures 9.75" square and 5 3/8" tall, and weighs 4.5 lbs. This reproduction sextant is fully functional but not intended for navigation.