This 75mm f4.0 Bell & Howell fixed focus GSAP (Gun Sight Aiming Point) mount lens was originally on the 16mm wing cameras of fighter planes and ran whenever their machine guns fired to record whether or not they hit their targets. Those 16mm wing cameras are today used as 'crash cameras' to record combat or sports action, and this lens could be used to repair such cameras. It could also be removed from its GSAP mount and used for a variety of other appliacations. To see over 200 related items, click on the “more ads by this user” link at the right. This item is in excellent condition, but is sold as-is, no returns, so pickup and inspection in Tucson, Arizona, is preferred. Out of town buyers email with any questions and for payment and shipping options.