That looks like an unexploded Italian model 35 hand grenade (see Italian Mod. 35, O.T.O. - Inert-Ord.Net). Its missing the safety pin and lever - If I was you, I'd keep well away from it and report it to the authorities. They have a impact fuze.
From the website I checked 'Painted a vivid red and having a notorious reputation of being dangerous when found in an unexploded condition they were nicknamed "Red Devils" by the British during the 1941-42 desert campaigns.
'I do not think we can hope for any better thing now.
We shall stick it out to the end, but we are getting weaker of course, and the end cannot be far.
It seems a pity, but I do not think I can write more. R. SCOTT.
Last Entry - For God's sake look after our people.'
In memory of Capt. Robert Falcon Scott, Edward Wilson, Henry Bowers, Lawrence Oates and Edgar Evans. South Pole Expedition, 30th March 1912.
I think the phrase clucking bell comes to mind
When you're wounded and left of Afghanistan's plains,
An' the women come out to cut up what remains,
Jest roll to your rifle an' blow out your brains,
An' go to your Gawd like a soldier." - Rudyard Kipling
Thanks a lot. Everytime I scuba dive I am founding different granades and bombs. Our lake is full with this. I took this granade with a boat and now is laying on more than 100 meters at the bottom. Next time I will post more pictures from other weapons I am founding. Thanks for the answer. Cheers
Don't be 'founding' too many of these - we dont want your luck to run out!!!
" When you're chewing on life's gristle, don't grumble, give a whistle "
All i find is old beer cans - sounds like a great lake!