[davemc]

       
For you doubters, I have attached two photos.  My cheap camera cannot do a decent job that close with no lighting.  One photo is from the front, no voltage on the coil.  The other is with 9 volts connected, so the vane is tilted.  In both cases, note the bright line on the vane where the other half USED TO BE.  It's hard to see, but the rear vane (back side, closest to the lamp) is present.  The the front side of the vane is missing - broken off where the bright line is (bare metal - the remainder of the vane is dark).  Just my opinion.