Hickory n steel is absolutely right.
To expand on it a bit: "topor" simply means "axe" in Russian.
This pattern is called(in USSR's Standards)a "Б"(B in English)-type,it could be Б2,or -1 to -4,depending on weight.
What makes it that is the straight cutting edge,the curved or radiused ones are "A" series.
This is a thin-bladed joiner's axe,it's for construction/cabin-building/cabinet-making and related woodwork.
It has Nothing whatever in common with axes you mention,GB,CT and all that.
This is a paring tool,not a chopping one.
And the quality will different Wildly.
I think you've already talked yourself out of it-that's wise.You don't want it.