I would agree with the other posters, the knob looks like a match to your bat. You can clearly see the black mark on the bottom of the knob, just like yours.

I'm a big Dwight Evans fan and I must admit I'm jealous of your purchase! You need to buy a copy of that card in nice shape to display with the bat, or at least I would. Congrats on a sweet bat and a really cool match.

And may I ask how much you paid? I only ask because I would LOVE to have a Dewey Red Sox bat for my collection too.