With all due respect Joe, I believe it to be a different blade.
Below is a joined photo of a picture of both blades with a piece of paper squared off to see the relation of the beginning of the notch on the bottom of the blade, to the top, and the distance to the hilt from the imaginary square line.
Bo would not have had enough metal to do the Spanish notch with this blade. Plus the hilt is much more angled and would have exposed much more of the original bottom notch.
Just my opinion.
