Original WWII Japanese Type 10 Display Grenade Discharger Knee Mortar dated 1937 with Matching Serial 6166 British Uniform The shell chin strap is

The shell chin strap is complete

There is also a white paint letter N in the rear of the inside helmet bowl

The lock plate is marked P10 for King Pedro III

3) Two rows of proof marks under barrel

especially considering service and age

Original WWII Japanese Type 10 Display Grenade Discharger Knee Mortar dated 1937 with Matching Serial 6166 British Uniform The shell chin strap isOriginal Items: Only One Available. These are extremely rare, and this is the first example we have seen of a Japanese Type 10 Knee Mortar! It is totally non functional and inert having been demilled according to specifications outlined by the BATF (Bureau of Alcohol, Tobacco, Firearms and Explosives). The Type 10 Grenade Discharger inaccurately and colloquially known as a knee mortar by Allied forces, is a Japanese grenade launcher or light mortar