I do not know the working condition of this. The dial does adjust the lens as it should. Please look at all photos carefully as they are a part of the description as well. The item “WW2 US Navy Mk 20 Mod 4 Fighter Aircraft Illuminated Gun Sight” is in sale since Monday, March 25, 2019. This item is in the category “Collectibles\Militaria\WW II (1939-45)\Original Period Items\United States\Machine Parts & Accessories”. The seller is “huntingtonhangar87″ and is located in Huntington, Indiana. This item can be shipped to United States.
- Country/Region of Manufacture: United States