No prob, Jumprightinit, glad to help.
Maybe the guy who carved it sent it to his family? Kind of like a letter?
The word ROBATAT means "To work, I work, etc" in russian.
ROBATAL can mean I'm Working there, I Worked there, or I'm going to be Working there...
Really no distinction between them translated to english.
Maybe he sent that to his family so they knew he was alive and his wherabouts?
Who knows?
Also wanted to say you might be careful who you show that to. If it is some kind of valuable piece you might get people coming out of the wood work saying that it belongs to their peoples or their tribes stuff and it is a long lost artifact and wanting it back!?
Has happened before and ya just never know?
Good luck and take care of it.