This round has no markings of any kind anywhere that I can see.
The fuse is a sold brass dummy. The primer looks to be a tin or maybe cn material.
There is some sort of insert inside the case that looks a lot like a charge container you might see in a grenade. It is thin sheet metal, fits tightly inside, and has a small hole at the base that appears to be there to allow the primer to ignite the propellant. This round appears to have never been loaded.
Can any of you guys tell what it is?