I.D. this wooden box

[cmp_uc_guy]

Heres the story that came with this box...

A gentleman "borrowed" it from CIL in Nobel Ontario shortly after the war and it remained in that persons family shed until it was given to me today. He painted over the lettering but I managed to remove a bit to read "30 GRENADES HAND SMOKE" with more lettering under that. I decided to post here hoping someone can tell me the rest as it is destroying the lettering and I'd like to restencil it.

Also in the upper left is and dont quote me on this...."M30-..21-11" and to the left and centered looks like the beggining of "NO SMOKING"

can anyone help with this?

Thanks
Rob