Odd 20mm round..

[Nismosonic]

Hi all.
Could anyone identify this please?
Been handed down to a friend.

 

[pysall]

What head-stamp please?

 

[Nismosonic]

M within a diamond then 20mm Mk4 *

 

[Spaceinvader]

20mm Oerlikon round thats been cut in half and put back together.

 

[pysall]

Agree with that.

 

[ozziammo]

Have a look at the tip of the fuze, if it has small holes in it then it has been made into a salt or pepper shaker, I have seen many done like this.
Regards Ozzi.