This is RG-33 which was found somewhere around 60 km from Tallinn, Estonia. These grenades are now accuratly de-activated and came to the museum, the fuses went to the demolition service, here is not a such specialist to deactivate them here . ( But in the war time it was fashionable by soldiers to make a pencils from them) now I strictly recommend to not alter them to prevent your eys and fingers from a accident. The grenades was hidden in an the attic ( under the layer of dry sawdust), probably by soldier who hide from Germans and who got civilian wear, or farmer who take them from a dead body in 1941.
Enjoy this beauties!