Chinese Korean War 60mm Mortar Sight Dated 1953

A hard to find piece of Korean War dated optics. Used on the Chinese Type 36 60mm Mortar. Optics are good. Well marked. The 60mm Mortar was favored by the Viet Minh, Viet Cong and NVA as well due to its relative light weight and impact. THIS IS AN ITAR ITEM AND CANNOT BE EXPORTED OUTSIDE THE US.