The mark on kindjal is of Zlatoust arms factory, but not the commonly seen one, in addition the tip with position of the grooves looks strange, as if the blade were shortened. Of course there are forgeries of Zlatoust weapons made - I am not able to say if this is the real thing or not.
Is there a mark on the other side of blade?
You can search for Zlatoust on forum.
https://pegasus-leaders.com/zlatoust-blade/