This is an original WWII issue Navy Bureau of Aeronautics issue MK 8B airnavigation computer. It calculates time & distance and is constructed ofaluminum 4 ¼” inches in diameter. It is marked on the front, “COMPUTER MK 8B, BU AER-U.S. NAVY”. Part of the Naval Aviator’s air navigation kits. Appears tobe in very good overall condition. The highest quality obtainable. Priced tosell. All items sold are 100% guaranteed. WE SHIP WORLDWIDE.COMBINEDSHIPPING NOTICE:I am happy... to combine shipping to save costs. REGARDING IMPORTDUTIES- This is the responsibility of the Buyer. All imported parcels aresubject to some type of tax.FEEDBACK-Once you havereceived your purchase and everything is fine, please leave feedback. If thereis a problem or concern contact me and I’ll make it right. Once feedback isreceived I will reciprocate.