RPG-57 HEAT hand grenade

[MINENAZ16]

I don't really understand origin of this grenade, German (NVA), Russian or Czech ?

https://www.yumpu.com/de/document/read/11117258/panzerabwehrhandgranate-wz-57/3

 

[AKON_]

Hi MINENAZ16
It is Polish ammunition.
The description is in this regulation.
Instrukcja piechoty. Granaty ręczne, MON, Warszawa1961

 

[Francesco_Dif]

I never seen one in picture...

 

[Przemo]

Probably, only prototypes existed