This is an original US Army Air Forces gunsight N-9-1 made by Sperti Inc. During the Korean War era in 1952. It was used on P-51 Mustang planes and is a piece of militaria that would make a great addition to any collection. It is in good working condition and has been well-preserved over the years.
The gunsight is a rare and unique piece that is highly sought after by collectors. Some scuffs and scratches but really in great condition.
See pictures for physical condition.