0 Computing Gun Sight! This gunsight was used specifically in Turret Gunner positions of various bomber aircraft, such as the TBM, PBY A26, and others! Made by Lukas-Harald, t. He Mark 18 is an electrically operated, computing, reflector-type sight designed for use in power turrets. The gunner makes the proper settings on the control units, after which it is only necessary for him to “range and track” the enemy plane, for the sight automatically figures the proper point of aim. It makes no difference whether or not the enemy plane is in a pursuit curve, or whether the gunner is strafing a stationary target. This sight handles all situations equally well. It is not necessary for a gunner to be familiar with the internal construction of the Mark 18. Made of aluminum, steel, and glass, and dating around 1944, this is an AMAZING USED example. Though there are some light scratches and wear from storage, it. Retains 98% of it’s original finish with the original bulb! All the glass is original to this sight, and includes a flip-up sun shield so that the pilot could see easier when flying in brighter light. The data plate is 100% intact, and clearly indicates the model and type. The original connection lines are also present! Comes complete with the display stand shown. Would make an EXCELLENT addition to any collection, display, or simply as a conversation piece! TERMS OF SALE. Most of my items are vintage, and as such are AS-IS, so you must therefore expect a degree of wear due to age and/or usage. ABOUT ME. Although my passion is the Me109, I do offer many other German Aircraft Fw190, Me262, etc. , as well as USAF and Japanese items. Occasionally I do offer many non-vintage items such as prints and art relating to the time period. Use is solely based on my authorization only. The item “WW2 US Navy Mk. 18 Aircraft Computing Turret Gunsight TBM PBY A26 #2 NICE” is in sale since Saturday, December 8, 2018. This item is in the category “Collectibles\Militaria\WW II (1939-45)\Original Period Items\United States\Other US WWII Original Items”. The seller is “messerschmitt*109″ and is located in Malibu, California. This item can be shipped worldwide.