This is an authentic WW2 gun air pressure gauge and book for the Lockheed Hudson aircraft, a rare find for collectors of military memorabilia. The gauge was used during the war and has a unique historical value. It is a must-have for aviation enthusiasts and those interested in the history of military technology.

The item is in working condition, with all the parts intact. The book that comes with it provides valuable information on the aircraft and the role it played in the war. This is a great addition to any collection of transportation collectables, especially for those interested in aeronautica and military memorabilia.