Unknown piece

[Baldari]

Here is one unknown piece of hand granate, at least i think so.
This item was found in place were germans fought with partisans
Measures are 10 x 4,5 cm. Does anyone have an idea?

Baldari

 

[Grenadier]

Typical improvised partisan HGr., similar to this here:
http://www.lexpev.nl/grenades/sovietbalkan/sfryugoslavia/partizankadrvar1941.html
You may have a look here too, almost modern (Yugo-war ~1991), but very similar:
http://www.lexpev.nl/grenades/sovietbalkan/croatia/eljezarasisak.html