That's not a Sako. I think it's a simplified 98. Others with more knowledge than I can answer.

I've seen Browning rifles with actions similar to this one but with a claw extractor and CRF. The difference in them and a M98 was the interesting bolt stop/release Browning used. Here you have the same bolt stop/release, but no claw extractor. I've not seen one like that.

Curl