Strange uncommon "Murata training bayonet"

[Ljus]

I found strange uncommon "Murata training bayonet" bayonet.
Seller says it is "Murata training bayonet".


It's Features:
Overall lenght: 416 mm
Blade lenght: 282 mm
Blade width: 23.3 mm
Muzzle ring: 17.8 mm



Does it original authentic item?
What do you think?

[Ljus]

I cannot find similar bayonet in the common japan's bayonets books
Like Raymond C. Labar or Larry Josnson.
As I know Labar's book most comprehensive reference...
And bayonet do not seem like a fake...