Antique Brass Alidade Compass 14" The Nautical Antique Brass Alidade Compass with telescope and bubble level is a beautiful nautical gem. Its beauty proves to be a perfect accent for spaces such as desktops, bookshelves, mantles, and more. This antique brass alidade has a magnetic compass mounted beneath it for guaranteed accurate readings as well as a bubble level placed on the telescope for precise sightings. The alidade mounts on an antique brass support with a complimenting hardwood base. Three adjustable leg-screws are included for perfect balance. This antique brass nautical gem features a real working telescope, a fine-quality item for surveyors to align and measure vertical and horizontal angles. View photos for further details.