Hello,
Depending on which view, Tim you might find the right information on these
pages. Some straight, some with the radius you like so much, some with the ends all relieved there.
So, I'm only making a direct translation from what little I can make of the Swedish, but spar, that is the Christmas tree, the spruce, though when used in connection to construction it's limited to small diameters no more than 15 cm buts at most and usually less, so the one from the video wont qualify sorry to say. That's a nice finish the axe leaves behind though and typical of what I've seen in old buildings. How fine it would be cutting through such wood I can only imagine.
And then bila, is the same as axe for you and me.
I understand that in Sweden and Latvia and Estonia etc... production and export of spars was a kind of greenwood industry back when people did things like that. It's something about the slow growth in a particularly managed forest parcel where they hauled the spars out from. In Finland I here tell of experimental forests where square trees are being developed, very secretive and all.
Greetings,
Don Wagstaff