I would love this thing had I not spent so much money on it (I ain't saying how much) in the mistaken belief that it was the real thing - an antique officer's compass. I found it at the Rose Bowl Swap Meet in Pasadena on a table of similarly cool looking old geomancy instruments, covered in a thick patina of authentic-looking corrosion, its mother-of-pearl indicator disc still floating freely beneath three layers of glass and pointing pretty accurately North. Snapped it up, took it home, brought out the brass polish and quickly revealed it to be a fake, likely knocked off in India for a few rupees for sale to ignorant tourists and overseas rubes like me. Very pleasantly heavy and warm to the touch.