Yes, my mistakelast one could also be for the PK-16 laucher, i think the rocket is too small for the 140mm version...
The matter is not as clear as it seems.The left and second from left (white nose) are RPG 75 drill
RPG-75 Czechoslovakia
Cutaway model of a RPG-75 recoiless anti tank launcher. This weapon was designed in Czechoslovakia in the 70’s of the last century as a light and disposable single use anti tank weapon. However, as the US counterpart the 66mm LAW used a rocket, the RPG-75 used the recoiless gun principle. The...www.bocn.co.uk
Czechthe dummys where used in drill rpg's with the marking skolni. Are they polish made?