Gun Sight, Reflector, Type N-6A SB2C Helldiver The manual covers instruments that

The manual covers instruments that were eventually used in aircraft of the Air Corps US Army and Air Force US Army during WWII

and the interior side of the glass requires cleaning

the instrument consists of two main components: a sighting tube

According to the Maintenance and Interchangeability Chart dated Feb 1945

as used in aircraft of the US Navy such as the SBD Dauntless Dive Bomber

Gun Sight, Reflector, Type N-6A SB2C Helldiver The manual covers instruments thatHere is a fine example of the Reflector Gun Sight, Type N 6A, as used in gun turrets of aircraft of the US Army Air Force during WWII. From our friend Laurent at Aircraft Gunsights. com: "The N 6 was the first of the N series to be specifically designed for flexible gunnery for use in turrets not equipped with compensated sights. AAF Material Command also requested the N 6 to replace the old iron sights on all other gun positions in medium and heavy