No one thought in the old days to look at the sharpening grinds to check for INFI.
I think, in retrospect that I do not ever remember seeing an asym original factory sharpening on any A-2 Busse knife.
All of the A-2 that I have, or remember was pretty evenly sharpened one side to the other.
On the other hand, I have imbibed a bit since then.
On the other, other hand, that looks to be the most common INFI Straight Badger, the Tube handle faster, while first tested by Busse on the Straight Badger, It was also the first of the straight handles to go out of production.
If and when I ever actually find my notes I will be able to say just how long the straight Badger with the Tube handle fastener was produced.
Not long I think.