Thank you for viewing. This is an aircraft magnetic compass (MFR'S PART NO. 1818-4-A) manufactured by Bendix Aviation Corporation, used in U.S. military aircraft during World War II. It is a historical instrument that was installed in famous military aircraft such as the B-17 and P-51, and is a very popular item among military collectors. This item has a weathered appearance as shown in the photos, but the compass fluid remains, and the internal display moves. Please check the condition in the images. How about it as a display piece that evokes history? This item is being sold due to the disposal of inherited items, so I do not know any details other than the above. Please purchase this item if you understand that it is a military surplus item.