During the existance of Yugoslavia (before 1991) all rifle grenades were produced by Yugoslavian federal factories for its Yugoslavian people's army.
All of them were produced by factory SČ (SLOBODA / city of Čačak), except chemical rifle grenades (MTHŠE M-83 and MTHŠD M-83) whose finalization and filling with chemical agents was done in the factory MZK (MILOJE ZAKIĆ in the city of Kruševac).
After 1991, when Yugoslavia broke up to 6 former states and the civil war had begun, the production of rifle grenades started in various factories in Bosnia, Republic of Srpska and in Croatia.
All of the new formed armies(Croatian,Bosnian and Army of bosnian serbs) started development of rifle grenades in every factory which had machinery suitable for making those grenades.
Many of those factories were ex-yugoslavian military factories with suitable machines for laboration of explosives, but there were a couple of factories which had a civil line of production before the war.
At the start of the war, most of these rifle grenades carried the same name as those made before 1991 for Yugoslavian people's army after the originals that were copied. There were also some new designs developed during the war.
It is very easy to see the difference between those produced before 1991 from those produced after:
ALL YUGOSLAVIAN RIFLE GRENADES PRODUCED BEFORE 1991 HAD MARKINGS OF FACTORY SČ(in serbian cyrillic alphabet or in latinic alphabet, the latinic alphabet markings were export variants) or MZK(only on chemical rifle grenades MTHŠE M-83 and MTHŠD M-83)
ALL RIFLE GRENADES PRODUCED AFTER 1991 DON'T HAVE SČ MARKINGS OF MANUFACTURER,THEY HAVE OTHER MARKINGS OR THEY DON'T HAVE MARKINGS OF MANUFACTURER AT ALL.