What is this for a Grenade


#1

Hello guys i got these grenade today. what is it looks like a ww1 bomb???. I dont know.

Maybe someone knows it


#2

Well done finding this one.
It appears to be one of Martin Hale’s aircraft bomb designs (this is no grenade). And in my view it was not adopted officially. So most likely you have a prototype.
Here some excerpts from his patents of which #1 (from 1916) on the left seems to be the closest. Also the small side way safety catch is in there (numbered “12” in the drawing).
The variant encountered on WW1 battlefields is the #3 from left.