This is an original USAF F-4 Phantom II fighter aircraft pilot's angle of attack indicator gauge instrument. The AOA gauge is critical when landing on an aircraft carrier. You must keep a constant angle of attack so that the aircraft will land in a position to catch a arresting wire.   The gauge is in very good condition.  It is 2 1/2 x 2 1/2 x 7 inches.  This item is being sold as a collectible.   Payment must be received within 10 days of auction closing unless prior arrangements have been made. Buyer to pay shipping. AZ residents add 6.7% sales tax. If you have any questions please contact me via e-mail before bidding. Thank you for your interest in my auctions.