The gent who made this brush did it whittling by hand, no machine work. Came out pretty good I think. As for the E-3, closer shave than the J2 but didn't feel aggressive. It is 10 hours since I shaved and very little stubble on the face. Very close shave.
@ram57 - Do you find the E-3 more aggressive than the J-2? That is a nice looking brush.