I have no idea who did it.
However, I have seen similar work a few times in that whoever did it not only didn't make any attempt to hide the work, they went so far as to call attention to it--I think someone posted pictures here a while back of a butt extension done in a somewhat similar vein (with a large curved radius and in a contrasting wood). I rather like the approach...they are acknowledging that you will be able to see the "augmentation" for what it is and rather than try to hide it they just say "hey--it's here, it's not hidden under a paint job or the like, but I did take some time to make it as classy as I can".
