This defensive grenade was used by the former Yugoslavian army.
It has a cast steel body.
I'm not sure if this grenade is pre-fragmented on the inside like the M38 defensive grenade.

Length w/ fuze :
Length w/o fuze :
Diameter :
Weight : 450gram
Filling : 45 - 50 gram TNT
Fuze : time fuze V. T. Z. M. 12/25

Information and sketch thanks to Ivica.
Photos © Igor.